Monday, January 18, 2010

Hydrangea

A genus of around 100 species of trees, shrubs and vines native to moist woodlands of the Americas and eastern Asia.
Most Hydrangeas are tough plants however prefer partial sun though tolerate full sun, on moist, fertile soil that isn't too heavy. Hydrangeas enjoy cool soil that doesn't dry out and therefore mulching is recommended. Hydrangeas are not salt tolerant.
Pruning is generally carried out in late winter and differs upon species.
Hydrangeas tend to leaf out early in spring and plants in areas prone to late spring frost risk damage to the foliage unless in a sheltered location or near water.
The species can be reproduced from seed sown in spring however cultivars are propagated from cuttings only whether hardwood cuttings in winter or tip cuttings in late spring. Hydrangea serrata and H. macrophylla cultivars root very easily.

* photos taken on June 15 2012 in Columbia, MD

Hydrangea anomala
A rapid growing deciduous, aerial rooting self clinging vine reaching a maximim height of 50 feet in height. It is very similar to Hydrangea petiolaris and is native to Sakhalin, South Korea and most of Japan.
The coarsely-toothed, oval leaves, up to 6 x 4 inches in size are deep green above.
The white flowers are borne in flat corymbs, up to 10 inches across, during early to mid summer.
Hardy zones 4 to 7 and is pest free. Difficult to transplant unless very small, it may be slow growing until full establishment.

'Glabra'
A vine reaching up to 66 feet with pink flowers borne on lacecap clusters up to 6 inches across. Native to Taiwan.

'Tilifolia'
Very fast growing with, huge, sharply-toothed leaves and flower clusters up to 10 inches across. The attractive shredding bark is reddish.

'Winter Glow'
Reaches up to 60 feet or more, with serrate-edged, evergreen leaves that turn purple in winter. The flowers are borne on lacecap clusters during mid to late spring.

'Winter Green'
Evergreen with foliage turning very purple in winter.

Hydrangea arborescens ( Smooth Hydrangea )
A very fast growing, open, typically suckering shrub reaching around 5 feet or more that is native to moist woods of the eastern U.S. ( from southeast Kansas to northern Indiana to southeast Iowa to central New York State to Massachusetts; south to eastern Oklahoma to northern Louisiana to far northwest Florida to South Carolina ). It is endangered in Kansas and New York State. Some records include: largest on record - 12 x 20 feet.
The broadly oval, pointed leaves, up to 9 x 7 inches are lush deep green. The foliage turns pale yellow during late fall.
The showy, very profuse creamy white flowers are borne in flat flowerheads up to 12 inches across in summer. The flowers attract hummingbirds and butterflies.
Hardy zones 2 to 8b on moist soil in partial shade on fertile, moist, well drained soil. Extremely adaptable, it is hardy from Alberta to northern Florida. Some of the hardiest seed source even survives in south-central and southeastern Alaska. The best flower displays are on plants that are cut back to 8 inches from ground level in March for vigor. In zones 2 and 3, it may die back completely to the ground during the winter, re-emerging during the following the spring and blooming the very same summer.
Smooth Hydrangea is not generally eaten by deer.

* photos taken on June 23 2013 @ U.S. National Arboretum, DC

* photos taken on Aug 4 2013 in Bayfield, Ontario

* photo taken on July 28 2015 in Marine City, MI


'Annabelle'
Similar in size to H. arborescens, reaching up to 5 feet if grown as a cut back perennial.
The leaves on cut back plants are unusually large, up to 15 inches in length and are bright green, turning pale yellow during autumn.
Pure white flowers borne in huge flowerheads up to 1 foot across.
It thrives even in Alberta's harsh climate however growing much smaller, only around 3 x 5 feet in 5 years. Plants may live 50 years or more.

* photos of unknown internet source


* photos taken on Aug 2 2012 in Bayfield, ON

* photos taken on June 23 2013 @ U.S. National Arboretum, DC

* photos taken on Aug 1 2013 in Stratford, Ontario

* photo of unknown internet source

* photo taken on June 24 2014 in Columbia, MD

* photo taken on June 9 2015 in Columbia, MD

* photos taken on July 27 2015 in Bayfield, ON

* photo taken on July 25 2015 @ Niagara-on-the-Lake, Ontario

* historical archive photo

* photo taken on Jun 20 2016 in Columbia, MD

* photo taken on July 16 2016 in Bayfield, ON

* photo taken on July 17 2016 in Blyth, ON

* photos taken on Jul 17 2017 in Ottawa, ON

* photo taken on Aug 5 2017 @ Brookside Gardens, Wheaton, MD


'Bella Anna'
Very similar to 'Invincibelle Spirit' but slightly smaller, growing at a moderate pace to 5 x 6 feet. The foliage is deep green turning golden-yellow during autumn.
The large, deep pink, mophead flower clusters are borne on old and new wood during summer and autumn.
Hardy zones 3 to 8.

* photos taken on June 16 2013 in Columbia, MD

* photo taken on June 16 2014 in Columbia, MD

* photos taken on June 15 2016 in Columbia, MD

* photo taken on July 1 2016 in Columbia, MD

* photos taken on June 3 2017 in Columbia, MD

* photos taken on June 10 2017 in Columbia, MD

* photo taken on Aug 8 2017 in Columbia, MD


'Grandiflora' ( Snowhill Hydrangea )
Pure white sterile flowers in mop heads up to 8 inches across.
Plants sucker forming clumps up to 20 feet across.

* historic archive photos


'Haas Halo'
Reaches up to 5 x 5 feet, bearing huge lacecap flower clusters, up to 14 inches wide, atop sturdy stems. The white flower clusters are the largest of any Hydrangea.
Hardy zones 3+, it is more drought tolerant than most H. arborescens.

* photos taken on July 17 2017 in Ottawa, ON


'Hayes Starburst'

* photo taken on Aug 8 2017 in Columbia, MD

* photos taken on Aug 24 2017 @ U.S. Botanic Garden, Wash. DC.


'Incrediball'
This is the 'Annabelle on Steroids" Hydrangea. It is truly spectacular! The flowers are borne in massive basketball-like flower clusters, up to 1 foot across.
They open lime-green, turning to pure-white then back to greenish-yellow as they fade during autumn. Up to 75 or more flowers may be borne at a time on a plant over a period of 2 months lasting mid-summer into fall. The flowers are borne on massive, thick, sturdy stems and do not flop. Besides having larger blooms, it also blooms much more profusely than 'Annabelle'.
The foliage is luxuriant deep green.
A fast growing, large, mounding shrub, reaching up to 5 x 8 feet, it is recommended to cut this Hydrangea back hard during late winter to enhance blooming.
Hardy zones 3 to 9 in sun or partial shade ( afternoon shade preferred in the south )

* photo taken by Milan Havlis, owner of central Europe's premier plant nursery

* photos taken on July 25 2015 @ Niagara-on-the-Lake, Ontario

* photo taken on Jul 27 2015 in Bayfield, ON

* photo taken on May 27 2017 @ Meadowlark Botanical Gardens, Vienna, VA

* photo taken on Jul 17 2017 in Ottawa, ON

* photo taken on Sep 20 2017 in Columbia, MD


'Invincibelle Spirit'
Same as 'Annabelle' but with pink blooms. Sturdy and vigorous, it blooms on new wood and re-blooms until fall frosts. The flowers, lasting 4 months of more, are deep pink in bud, opening to hot pink, then fading to soft pink then finally to green at the end of the bloom cycle. The flower clusters reach up to 12 inches across. Up to 100 or blooms may be borne on a plant that may reach up to 6 x 6 feet ( average 4 x 5 ) feet in 10 years, eventually more.
The foliage is luxuriant, verdant mid-green.
Hardy zones 3 to 9 and heat tolerant. It may become a perennial in zone 3 but plants survive at least as low as -40 F. It thrives from Manitoba south to the Gulf Coast.

* photo taken on June 8 2012 in Howard Co., MD
* photos taken on Aug 3 2012 in London, Ontario

* photo taken on June 30 2013 @ U.S. National Arboretum, DC


'Mary Nell'
Reaches up to 6 feet in height, with large clusters of white multisepaled flowers.
It has excellent heat tolerance for a Hydrangea arborescens.

subsp 'Radiata' ( Silverleaf Hydrangea )
Foliage is deep green above and silvery-white felted beneath; otherwise identical to species.
It is native to the southern Appalachian Mountains ( eastern Tennessee to western North Carolina; south to northern Georgia ).
Hardy zones 4 to 8a

'Samantha'
A clone originating from subspecies 'Radiata', reaching up to 6 x 6 feet.
The very attractive foliage is deep green above, nearly white beneath.
The foliage turns to bright yellow during autumn.
It is otherwise similar to the species.
Hardy zones 3 to 6, it is unfortunately less heat tolerant than the species and not adapted to non-mountainous parts of the southeast.

Hydrangea aspera
Also called Hydrangea villosa. A variable deciduous shrub native to eastern Asia and reaching up to 11 x 10 feet though the largest on record is double that.
The leaves are large, up to 7 x 4 or rarely 13 x 6 inches and deep green above and velvety beneath.
The lacecap flowers are borne in flat flower heads up to 12 inches across during summer. The sterile flowers can range from white to pink to purple and the fertile flowers are blue.
The young stems are hairy. The exfoliating bark is warm brown.
Hardy zones 6 to 9, thriving best from British Columbia south to the central California coast however also grows reasonably well from South Carolina north through. More drought tolerant than most Hydrangeas and also very alkaline soil tolerant. Shade is essential in the south. Deer resistant and seaside tolerant.
Cuttings do not root easily due to the downy leaves trapping too much moisture under mist propagation.

'Kawakamii'
A freak plant found in the wild in Taiwan with huge velvety leaves up to 24 inches across and massive flower heads up to 20 inches wide.

'Macrophylla'

* photos taken on Aug 5 2017 @ Brookside Gardens, Wheaton, MD


'Plum Passion'
Foliage is purplish-green at first, turning to deep purple above, rosy-purple beneath. The bright lavender-purple flowers contrast nicely with the foliage.

* photo taken on May 10 2014 in Harford Co., MD

* photo taken on May 30 2016 in Annapolis, MD


'Robusta'
Huge leaves, up to 12 x 13 inches, are deep green.

'Rocklon'
Reaches up to 10 x 10 feet, with fuzzy, deep purple stems bearing large foliage that is bronze, turning to deep green.
The leaves are up to 10 inches in length.
The fertile flowers are blue-mauve, the sterile flowers are white. They are borne on huge lacecap flowerheads up to 12 inches across.
Hardy zones 6 +.

Hydrangea heteromalla ( Shaggy Hydrangea )
A variable large bushy shrub reaching up to 20 x 10 feet that is native from the Himalayas to central China. Some records include: fastest recorded growth rate - 9 feet; largest on record is 33 x 30 feet with a trunk diameter of 15 inches.
The toothed, ovate leaves are large, up to 10 x 6 inches size. The foliage is deep green above and very downy, white beneath.
The lacecap flowers borne in clusters up to 12 inches across in summer are greenish-white and sterile on the inside and white turning to pink on the outside.
The bark is dark brown and peeling.
Hardy zones 6 to 9 ( possibly 4 for Qinghai seed source if on a protected site...thrives in Ottawa, Canada reaching 21 feet tall ) preferring partial shade on light, moist, well drained soil. Thrives best in the Pacific Northwest, Midwest and Northeast.

* photo taken on July 17 2010 @ Morris Arboretum, Philly, PA




'Bretschneideri' ( Mongolian Hydrangea )
Native to central China and hardier, north to zone 4, with attractive, exfoliating orange-brown bark.

* photo taken on Oct 21 2014 @ Smithsonian Inst., Washington, DC

* historical archive photos


'BWJ7657'
Reaches up to 10 feet. Similar to species except with black bark on 2nd year wood.

'Fan Si Pan'
Originated from Vietnam's highest mountain and reaches around 10 feet. The stems and leafstalks are scarlet red and the ovate leaves are also red in spring before turning to green. White flowers contrasts well on this very attractive shrub that thrives in sun or shade.

'Jermyn Lace
Bears greenish-white flowers that are pink tinted.

'Snowcap'
Sturdy growing to 15 feet in height, with huge oval leaves up to 11 inches in length

Hydrangea hirta
A small shrub reaching up to 5 x 5 ( rarely over 3.5 ) feet that is native to forests of Honshu Island in Japan.
The ovate leaves, up to 4 x 3 inches, are very glossy deep green.
The fragrant, bright blue-purple flowers are borne in clusters, up to 4 inches across, during early summer.
Hardy zones 7 to 9 ( should be tested in the U.S. since there are reports of zone 5 ) Thrives in sun or shade.

Hydrangea integerrima
A large, evergreen vine native to Chile that can reach up to 100 feet in height.
The thick, leathery, up to 6 x 3 inches, are deep green.
The white flowers are borne in domed panicles up to 6 inches across.
Hardy north to zone 7

Hydrangea integrifolia ( Taiwan Evergreen Climbing Hydrangea )
An imposing evergreen, vigorous, aerial rooted climber reaching up to 100 feet or more in height that is native to the high mountains of Taiwan and the Phillipines. This vine attains massive sizes ascending large trees in its native habitat.
The toothed, elliptic to oblong leaves are up to 9 x 3 inches in size. The attractive foliage is bright crimson red to red-purple at first turning glossy deep green. The flowers are white and borne in terminal inflorescences during late summer. Plants may take over a decade to begin blooming.
The younger stems are densely covered in bristly coarse, red-purple hairs.
Hardy zones 7b to 10 and possibly even to zone 6b. A forest plant in its natural range, it prefers moist, sheltered conditions however is tolerant of tree root competition if watered heavily until establishment.

Hydrangea involucrata
A rare, medium-size, deciduous shrub to around 6.5 x 6.5 feet, that is native to central Honshu Island of Japan and also Taiwan. Some records include: largest on record - 15 x 6.5 feet.
The bristly-margined, oblong leaves are up to 15 x 5 ( rarely over 8 ) inches in size. The rough foliage is glossy deep green.
The lacecap flower heads, up to 5 inches across, are borne during late summer ( sporadically during mid-summer and early autumn ). They consist of some sterile white florets surrounded by pinkish fertile flowers.
Hardy zones 6 to 10 in partial shade on moist, acidic, light, well drained soil. In zone 6 if may freeze back to the ground during severe winters then resprout during spring. Deer resistant.

'Blue Bunny'
A fast growing, dense, upright, rounded shrub, reaching up to 4 x 5 feet in size.
The foliage is fuzzy gray-green.
The lavender-blue, lacecap flowers appear on new wood from late summer into mid-autumn.
Hardy zones 6 to 9.

* photo taken on Oct 6 2016 in Howard Co., MD


'Hortensis'
Showy, pinkish-white to blue-white double, sterile florets.

* photo taken on 4th of July 2010 @ U.S. National Arboretum, D.C.


Hydrangea longipes
A rare, loose, spreading shrub native to southwest to central China that reaches a maximum height of 10 ( rarely over 7 ) feet.
The deciduous, oval to rounded, bristly-margined leaves, up to 9 x 5 inches in size are borne on very long, red stalks.
The white flowers are borne in lacecap flowerheads in late summer into autumn.
Hardy zones 5 to 9.

Hydrangea macrophylla ( Bigleaf Hydrangea )
A large, fast growing, very long lived, deep rooted, suckering shrub reaching up to 6 x 6 feet or more rarely 13 x 13 feet that is native to Honshu Island of Japan. Most cultivars reach a maximum height of 7 feet unless otherwise noted.
The deciduous leaves are elliptical, up to 9 x 5 inches and glossy mid-green above; bright green below.
The flower clusters are typically up to 9.5 inches across.
Hardy zones 5 to 10 in full sun to partial shade on moist, fertile, well drained soil. Very salt tolerant, it often grows along the ocean in the wild. This Hydrangea along with H. serrata can be influenced in bloom color by soil acidity. The more acidic the soil, the more blue the flowers on some cultivars. For most vigorous plants with the largest blooms, it is recommended to prune out 2/3 of the shoots starting from the oldest and least vigorous in late winter. Older stems that have exhausted all their vigor can also be removed at the base immediately after flowering.
Insect pest and disease problems are rare. Bigleaf Hydrangea root easily from stem or leaf bud cuttings taken from late spring into mid summer, under mist 1000 ppm IBA in 3 to 5 weeks. Cuttings root during most of the year.



* photo taken on June 19 2010 in Silver Spring, MD

* photo taken on November 7 2010 in Columbia, MD

* photos taken on Aug 2 2013 in Stratford, Ontario

* photos taken on June 18 2013 in Columbia, MD

* photo taken on July 24 2014 in Columbia, MD

* photos taken on July 15 2015 in Columbia, MD

* photo taken on July 17 2016 in Goderich, Ontario

* photo taken on Aug 11 2016 in Columbia, MD

* historic archive photo

* photo taken on Nov 4 2015 in Columbia, MD


'Abracadabra'
Reaches up to 4 x 5 feet, with glossy very deep green leaves borne on satiny black stems.
The pink and white lacecap flowers are borne on huge lacecap clusters that later mature to hot pink ( blue on very acidic soil ). The flowers are borne on old wood.
Hardy zones 5 to 9.

* photos taken on June 1 2013 in Clarksville, MD

'All Summer Beauty'
Fast growing and compact, reaching up to 6 feet in the first year and an eventual size up to 6 x 8 feet.
The abundant, light blue flowers are borne in huge clusters up to a foot across. The flowers are borne on old and new wood and last over a long season. This Hydrangea is similar in appearance to 'Nikko Blue'.
The glossy deep green foliage is unfortunately mildew prone.
More hardy than most, blooming even in zone 5

* photo taken on July 10 2013 in Columbia, MD


'Amherst'
Reaches up to 5 x 5 feet

'Ami Pasquier'
Reaches up to 6 x 6 feet. The attractive glossy deep green foliage turns red in autumn. The rich crimson red flowers are borne all summer long. The branches are very dark.

'Ayesha'
Fast growing, reaching up to 6 x 6 ( rarely 8 ) feet in 10 years, with waxy mid-green foliage.
The very abundant, light blue flowers are borne on clusters up to 8 inches across on this repeat bloomer.
Hardy zones 5 to 9.

* photo taken on May 17 2017 in Annapolis, MD


'Big Daddy'
Thick stemmed and sturdy, reaching up to 6 x 6 feet with massive blue ( light pink on alkaline soil ), mophead flower clusters up to 14 inches across. The flowers persist from early summer until autumn.
The thick, large, glossy very deep green leaves turn to yellow during autumn.
Hardy zones 6+ ( not recommended in 5 ), it is very tolerant of sun, heat and humidity.

* photos taken on June 25 2015 in Columbia, MD


'Blackberries & Cream'
Compact and sturdy in habit, reaching up to 4 x 5 feet.
The large foliage is glossy deep green.
The flowers are borne on large mophead clusters, up to 10 inches across during summer.
Hardy zones 6 +.

* photos taken on June 1 2013 in Columbia, MD


'Bloomstruck'
A compact repeat bloomer, reaching up to 4 x 5 feet.
The foliage is healthy glossy deep green, often turning stunning intense deep red during autumn. The foliage contrast nicely with the deep red leaf veins and stems.
The flowers, borne on mophead clusters, up to 5 inches wide, are violet-blue or rose-pink depending on soil PH.
Hardy zones 4 to 9, it is both very heat tolerant and mildew resistant.

* photos taken on July 1 2015 in Columbia, MD

* photos taken on Sep 17 2015 in Columbia, MD

* photos taken on Oct 7 2015 in Columbia, MD

* photos taken on Nov 6 2015 in Columbia, MD

* photo taken on Dec 6 2015 in Columbia, MD

* photos taken on June 24 2016 in Columbia, MD

* photo taken on July 1 2016 in Columbia, MD

* photos taken on Oct 17 2016 in Annapolis, MD

* photo taken on May 1 2017 in Columbia, MD

* photos taken on May 19 2017 in Columbia, MD

* photo taken on June 10 2017 in Columbia, MD

* photos taken on June 22 2017 in Columbia, MD

* photos taken on July 7 2017 in Columbia, MD

* photo taken on July 14 2017 in Columbia, MD

* photos taken on Aug 1 2017 in Columbia, MD


'Blueberries & Cream'
Compact in habit, reaching up to 5 x 5 feet, with large leaves and lacecap flower clusters up to 8 inches across.
Hardy zones 7a + ( possibly 6 on protected site )

* photos taken on June 1 2013 in Columbia, MD


'Blue Danube'
A semi-dwarf, reaching up to 4 x 4 feet in size.
The foliage is deep green.
The blue ( or pink on alkaline soil ) flowers are borne on mophead cluters.
Hardy zones 6a to 9.

* photo taken on June 3 2012 in Columbia, MD

'Blue Wave'
A vigorous bushy lacecap variety reaching up to 7 x 12 feet with blue-pink sterile florets surrounded by rich blue fertile flowers.
The toothed oval foliage is glossy bright green later turning to deep green.
Exceptionally hardy for a Hydrangea macrophylla, north to zone 4.

* photos taken on June 20 2013 in Columbia, MD

* photos taken on June 25 2017 in Columbia, MD


'Blushing Bride'
Reaches up to 6 x 6 feet in 5 years; eventually up to 6 x 7 feet. Can be used as an informal hedge. It is the white blooming counterpart to 'Endless Summer'.
It can bloom from April to October with blooms on old and new wood if dead-headed. The pure white ( aging to very pale pink ) flowers are borne in clusters up to 10 inches wide. The bloom season may last up to 5 months or more.
The attractive glossy deep green foliage is only moderately prone to mildew.
Hardy zones 5a to 8.

'Cityline Paris'
A fast growing, very strong-stemmed, bushy, dwarf from, reaching up to 3 x 4 ( reports up to 5 ) feet. The thick foliage is very glossy, deep rich green. It is very mildew resistant.
The very abundant, intense pink-red ( blue on very acidic soil ) blooms are borne in large, full size clusters, up to 6 inches across, on this repeat blooming Hydrangea. The flowers eventually age to purple. They are borne on old wood.
Hardy zones 5 to 9.

* photos taken on July 1 2015 in Columbia, MD

* photos taken on June 24 2016 in Columbia, MD

* photo taken on July 1 2016 in Columbia, MD

* photo taken on Sep 16 2016 in Columbia, MD

* photos taken on July 25 2017 in Columbia, MD

* photo taken on July 25 2017 in Columbia, MD

* photo taken on Sep 8 2017 in Columbia, MD


'Cityline Rio'
A fast growing, very strong-stemmed, bushy, dwarf from, reaching up to 3 x 4 feet. The thick foliage is very glossy, deep rich green. It is very mildew resistant.
The very abundant, bright purplish-blue blooms are borne in large, full size clusters, up to 6 inches across, on this repeat blooming Hydrangea. The flowers eventually age to bright green. They are borne on old wood.
Hardy zones 5 to 9. It is highly mildew resistant.

* photos taken on July 5 2015 in Columbia, MD

* photo taken on Aug 13 2017 in Columbia, MD


'David Ramsey'
A repeat bloomer, reaching up to 5 x 6 feet, that is very similar to 'Endless Summer' with huge flower clusters up to 10 inches across.
Hardy zones 4 to 9.

* photos taken on May 10 2012 in Baltimore, MD

* photos taken on June 9 2015 in Columbia, MD

* photo taken on July 7 2017 in Columbia, MD

* photos taken on Jul 19 2017 in Ottawa, ON


'Dooley'
Vigorous in habit, reaching up to 6 x 6 feet in 10 years and eventually 8 x 9 feet with blue ( pink on alkaline soil ) flowers borne on very large clusters. It is a repeat bloomer.
The deep green foliage is unfortunately prone to mildew.
Stem hardy to -11 F, it is hardy in north to Michigan.

* photos taken on July 15 2015 in Columbia, MD

* photos taken on July 7 2017 in Columbia, MD

* photo taken on July 16 2017 in Luzerne Co., PA

* photo taken on Aug 8 2017 in Columbia, MD


'Edgy Hearts'
Fast growing and sturdy, reaching up to 5 x 5 feet, with glossy foliage borne on strong stems. The leaves are bright green at first, turning to deep green.
The large, heart-shaped flowers are intense deep pink-red ( blue on very acidic soil ) bordered with white. They are borne on mophead clusters up to 10 inches across on a period of 2 or more months during summer. Up to 50 flower clusters may be borne at a time on a plant.
Hardy zones 5 to 9

'Enchantress'
Reaches up to 5 x 5 feet, it is nearly identical to 'Endless Summer' except with the added attraction of deep blackish-burgundy stems. Hardy zones 5a to 8.

* photos taken on July 25 2015 @ Niagara-on-the-Lake, Ontario

* photo taken on Aug 11 2016 in Columbia, MD

* photos taken on May 18 2017 in Columbia, MD

* photos taken on June 9 2017 in Columbia, MD

* photos taken on June 20 2017 in Columbia, MD

* photos taken on June 28 2017 in Columbia, MD

* photo taken on July 25 2017 in Columbia, MD

* photo taken on Sep 8 2017 in Columbia, MD


'Endless Summer'
Reaches up to 5.5 x 6 feet in 5 years.
It can bloom from April to October with blooms on old and new wood if dead-headed. The flowers are pink or blue depending on soil type and are borne in clusters up to 10 inches wide. The bloom season may last up to 5 months or more.
The attractive mid-green foliage is only moderately prone to mildew.
Can be used as an informal hedge.
Hardy zones 5a to 8. Exceptionally hardy with reports even as far as zone 3.


* photos taken on annual Horticultural Society of Maryland Garden Tour


* photo taken on June 3 2012 in Columbia, MD
* photos taken on June 16 2012 in Columbia, MD
* photos taken on June 14 2012 in Columbia, MD

* photos taken on June 18 2013 in Columbia, MD

* photo taken on June 20 2015 in Columbia, MD

* photos taken on July 1 2015 in Columbia, MD

* photo taken on Dec 3 2015 in Columbia, MD

* photo taken on July 1 2016 in Columbia, MD

* photos taken on June 6 2017 in Howard Co., MD

* photos taken on June 15 2017 in Howard Co., MD

* photos taken on June 28 2017 in Howard Co., MD

* photo taken on Nov 9 2017 in Harford Co., MD


'Enziandom'
Also called 'Gentian Dome'. Reaches up to 5 x 6 feet, with flowers that are the deepest, most intense blue of any cultivar. A repeat bloomer, they are borne on mophead clusters, up to 10 inches wide, from mid-summer until autumn frost.
The attractive deep green foliage is very scorch resistant. The leaves often turn to red during autumn.
Hardy zones 6 to 9.

* photos taken on June 17 2015 in Columbia, MD

* photos taken on July 9 2015 in Columbia, MD

* photo taken on June 25 2017 in Columbia, MD


'Firelight'
Also called 'Leuchtfeuer'. It forms a medium-sized shrub, reaching up to 5 x 5 feet.
The foliage is glossy mid-green.
The deep pink or red ( alkaline soil ) to deep purple flowers ( on acidic soil ) are borne on mophead clusters up to 8 inches across, all summer long.
Hardy zones 6 to 9.

* photo taken on June 24 2013 in Columbia, MD

* photo taken on June 12 2014 in Columbia, MD

'Forever & Ever Blue Heaven'
Upright, rounded and compact in habit, reaching up to 4 x 4 feet in 4 years, eventually up to 5 feet across.
The large leaves, up to 9 x 6 inches in size, are glossy deep green.
The intense blue ( pink on alkaline soil ) flowers are borne on huge mophead clusters up to 12 inches across, all summer long. The flowers are borne on both new and old wood.
Hardy zones 5 to 9.

* photo taken on June 24 2013 in Columbia, MD

* photo taken by Milan Havlis, owner of central Europe's premier plant nursery

* photos taken on June 13 2015 in Columbia, MD

* photo taken on Dec 3 2015 in Columbia, MD

* photos taken on June 24 2016 in Columbia, MD

* photos taken on July 8 2016 in Columbia, MD

* photo taken on Aug 13 2017 in Columbia, MD

* photo taken on Oct 28 2017 in Columbia, MD


'Forever & Ever Peace'
Rounded and compact in habit, reaching up to 3.2 x 5 feet.
The large foliage is glossy deep green.
The pinkish-white flowers are borne on mophead clusters 5 inches across, all summer long. The flowers are borne on both new and old wood.
Hardy zones 5 to 9.

* photos taken on June 24 2013 in Columbia, MD


'Glowing Embers'
Also called 'Alpenglow'. A vigorous, robust growing shrub reaching up to 6 x 6 feet in 10 years and eventually 6 x 8 feet.
The foliage is glossy deep green ( sometimes bronze-green in full sun ).
The flowers are typically scarlet-red though may be purple on soils with PH under 5. The mophead flower clusters are large, up to 8 inches across, and are borne over a very long season from early summer until autumn frost.
Hardy zones 5 to 9 ( may not bloom in 5 ).

* photos taken on June 20 2013 in Columbia, MD

* photo taken on July 7 2013 in Columbia, MD

* photos taken on June 28 2015 in Columbia, MD

* photos taken on July 11 2015 in Columbia, MD

* photo taken on Aug 6 2016 in Columbia, MD

* photo taken on Aug 24 2015 in Columbia, MD

* photo taken on June 25 2017 in Columbia, MD

* photos taken on June 25 2017 in Columbia, MD

* photos taken on July 7 2017 in Columbia, MD


'Goliath'
Lilac-blue ( turning to red during fall ) flowers in large clusters up to 9 inches across. Great near the shore but not the most cold hardy of cultivars.
Vigorous in habit, reaching up to 6 x 6 feet in 10 years, eventually up to 8 feet across.
The attractive foliage is glossy deep green.

'Hamburg'
Reaches up to 6 x 6.5 feet with large, deep green, oval, pointed leaves. The flowers are rose-purple to deep blue depending on soil PH and are borne in large clusters.
North of Philly this cultivar may die back to the ground and return to 3 feet the following season.

* photo taken on Aug 8 2017 in Columbia, MD


'Harlequin'
Very fast growing, with sturdy stems, reaching up to 5 feet in height.
The flowers are pinkish-red and edged in white. They are borne on mophead clusters.
Hardy zones 5 to 9.

L.A. Dreamin'
Reaches up to 5 x 6 feet.
The mophead flower clusters appear in both blue and pink on the same plant. It blooms heavily during early summer, repeating during late summer.
Hardy zones 5a to 9.

* photo taken on June 6 2017 in Howard Co., MD

* photos taken on June 28 2017 in Howard Co., MD

* photos taken on July 10 2017 in Howard Co., MD


'Lady in Red'
Fast growing and compact in habit, reaching up to 3.5 x 4 feet in 2 years and eventually to 5 x 6 feet.
The foliage is deep green with red veins and is very mildew resistant, turning striking red-purple in autumn. The burgundy-rose flowers are borne on clusters up to 5 inches across.
The stems are glossy lush red.

* photo taken on July 4 2010 @ U.S. National Arboretum, D.C.


* photo taken on Sep 15 2011 in Columbia, MD

* photos taken on June 30 2013 @ U.S. National Arboretum, DC

* photos taken on Sep 21 2013 in Howard Co., MD

* photo taken on July 15 2015 in Columbia, MD

* photo taken on Sep 8 2015 in Columbia, MD

* photo taken on Aug 6 2016 in Columbia, MD

* photos taken on May 27 2017 @ Meadowlark Botanical Gardens, Vienna, VA

* photo taken on July 7 2017 in Columbia, MD

* photo taken on Aug 21 2017 in Columbia, MD


'Lanarth White'
A lacecap variety, very vigorously reaching up to 7 x 7 feet with pure white ( with pink or blue eye ) flowers borne mid to late summer.
The oval leaves are glossy medium green.

* photo taken on July 1 2011 in Columbia, MD

* photo taken on June 16 2015 in Columbia, MD


'Lemon Daddy'
Reaches up to 5 x 5 feet, with foliage that is bright yellow, later deepening to lime-green.
The pinkish-blue ( blue on very acidic soil ) flowers are borne on huge mophead clusters up to 12 inches across.
Hardy zones 6 to 9 preferring shade.

* photo taken on May 14 2011 in Columbia, MD

* photos taken on June 23 2013 @ U.S. National Arboretum, DC


'Lemon Wave'
A medium-sized shrub, reaching up to 6 x 6 feet in 10 years, eventually slightly larger.
The blue flowers borne on mophead clusters contrast well with deep green foliage that is edged in yellow. It flowers during early summer on old wood only, the flower buds may be damaged north of zone 7.
Hardy zones 6 to 9 ( 7 + for blooming )

* photos taken on June 23 2013 @ U.S. National Arboretum, DC


'Let's Dance Moonlight'
A vigorous, sturdy, upright, compact, rounded shrub, reaching up to 3 x 4 feet.
The attractive, large foliage is glossy deep green turning to deep bronze-red during autumn.
The flowers range from deep pink ( alkaline ) to blue ( acidic ) and are borne on large dense clusters.
A repeat bloomer, it blooms heavily during early summer and repeating later during summer into early autumn.
Hardy zones 5 to 8.

* photos taken on Sep 21 2013 in Howard Co., MD


Lets Dance Starlight'

* photo taken on June 25 2017 in Columbia, MD


'Light O'Day'
The very vigorous, variegated version of 'Endless Summer' reaching up to 5 x 5 feet, with waxy mid-foliage that is boldly variegated with a bright creamy-white margin.
The blue or pink ( depending on soil acidity ) lacecap flowers are borne all summer long even after a zone 5 winter.

* photo taken on June 22 2014 in Howard Co., MD

* photos taken on July 25 2015 @ Niagara-on-the-Lake, Ontario


'Mariesii'
A lacecap variety with flowers that are light pink to light blue depending on soil acidity. The flowers are borne on large flat clusters.
It reaches an average of 5 x 5 feet in 10 years through may become much larger on ideal sites.
Hardy zones 6 +.

* photos taken on June 9 2015 in Columbia, MD


'Masja'
A dwarf only reaching up to 3 feet in 5 years, 5 x 5 feet in 10 years.
The foliage is lush glossy deep green.
The mophead flowers are rich red to rich blue-purple on this plant that often re-blooms.
Hardy zones 5a+.

* photo taken on June 24 2014 in Columbia, MD

* photo taken on June 25 2017 in Columbia, MD

* photos taken on July 7 2017 in Columbia, MD

* photo taken on July 15 2017 in Columbia, MD

* photo taken on Aug 1 2017 in Columbia, MD

* photo taken on Sep 8 2017 in Columbia, MD


'Mathilda Gutges'
Reaches up to 5 x 7 feet, with glossy deep green foliage and deep blue-violet ( often also pink or blue ) flowers borne on mophead clusters.
Hardy zones 6 to 9.

* photos taken on June 24 2013 in Columbia, MD

* photos taken on July 7 2017 in Columbia, MD

* photos taken on July 15 2017 in Columbia, MD

* photos taken on July 25 2017 in Columbia, MD


'Merritt's Surpreme'
Reaches up to 6 x 5 feet, with large clusters of deep rosy-purple flowers borne om mophead clusters up to 8 inches across atop thick stems.
Hardy zones 6 +. It blooms on old wood so blooming may be sparse where winter damage may occur.

* photo taken on June 3 2012 in Columbia, MD
* photo taken on July 15 2013 in Harford Co., MD


'Mini-Penny'
Compact in habit, reaching up to 4 x 4 feet.
The glossy deep green foliage is mildew-resistant.
This repeat bloomer bears blue ( or pink on alkaline soil ) flowers on mophead clusters up to 6 inches across. The flowers are borne early summer to early autumn on both new and old wood.
Hardy zones 5 to 9 ( possibly 4 on protected sites with a deep winter mulch ).

* photo taken on June 24 2013 in Columbia, MD


'Mme Emile Mouillere'
Vigorous in habit, reaching up to 7 x 8 feet.
The glossy green foliage turns orange and red during autumn.
The white flowers are borne on large clusters, up to 7 inches across, during mid summer, often repeating during early autumn.
Hardy zones 5 to 9.

* photos taken on June 23 2013 @ U.S. National Arboretum, DC

* photos taken on June 29 2013 @ U.S. National Arboretum, DC


'Nantucket Blue'
A fast growing shrub, reaching up to 6 x 6 feet.
The leathery foliage is deep green.
A repeat bloomer bears large mophead clusters of bright blue ( pink in alkaline soil ) flowers all summer long on both old and new wood. The flowers sometimes persist until autumn frost.
Hardy zones 4 to 8, the foliage is mildew resistant.

* photo taken on June 20 2017 in Columbia, MD


'Nigra'
Vigorous growing, reaching up to 10 x 8 ( rarely over 6.5 x 6 ) feet with glossy blackish-purple stems and smallish flower clusters that range from blue to pink depending on soil acidity.
The foliage is glossy mid-green.

* photo taken on June 19 2010 in Silver Spring, MD

* photos taken on 4th of July 2010 @ U.S. National Arboretum, D.C.


* photos taken on June 30 2013 @ U.S. National Arboretum, DC


'Nikko Blue'
Vigorous in habit, reaching up to 6 x 10 ( rarely over 5 x 6 ) feet with mophead clusters of blue flowers. It will often flower even the same season after it freezes to the ground.
The mid-green leaves are unfortunately mildew prone.
Hardy zones 6a+

* photo taken on June 19 2010 in Columbia, MD


* photos taken on June 14 2012 in Columbia, MD
* photo taken on June 29 2013 @ U.S. National Arboretum, DC

* photo taken on July 5 2015 in Columbia, MD

* photos taken on Sep 19 2015 in Columbia, MD

* photo taken on July 1 2016 in Columbia, MD

* photos taken on June 25 2017 in Columbia, MD


'Penny Mac'
Reaching up to 6 x 6 ( rarely over 5 ) feet, this repeat blooming Hydrangea bears pink or blue ( blue on acidic soil ) flowers on mophead clusters up to 7 inches across. The flowers are borne over a very long season from early summer until autumn frosts.
Dense and compact in habit, the foliage is attractive deep green, turning to deep red and purple during autumn.
Hardy north to zone 5a and it reliably blooms that far north as well.

* photo taken on June 20 2013 in Columbia, MD

* photo taken on June 17 2015 in Columbia, MD

* photo taken by David Artis on June 2015 in Columbia, MD

* photos taken on July 1 2015 in Columbia, MD

* photos taken on June 20 2017 in Columbia, MD

* photo taken on July 25 2017 in Columbia, MD


'Pia'
Slow growing and dwarf, only reaching a maximum size of 4 x 4 ( rarely over 2 ) feet in 10 years, eventually slightly wider. It makes a great plant for patio containers.
The large, rich deep green leaves are up to 7 x 5 inches in size.
The flowers range from pink to pinkish-red and are borne on mophead clusters, up to 5 inches across, during early summer.
Prone to leaf spot, insects and late spring frosts.
Hardy zones 6a+

* photo taken on June 2008

* photo taken on July 30 2013 in Columbia, MD

* photo taken on July 25 2016 in Columbia, MD

* photos taken on July 7 2017 in Columbia, MD


'Pink Shira'
A strong-stemmed, compact shrub, reaching up to 5 x 5 feet.
The foliage is deep green.
The rich deep pink ( lavender on acidic soil ) flowers are borne all summer long on this repeat bloomer.
Exceptionally hardy, north to zone 5.

* photo taken on June 16 2015 in Columbia, MD


'Pistacio'
Vigorous, sturdy, rounded and compact, reaching up to 4 x 5 feet.
The large leaves are glossy deep green.
The deep deep pink to scarlet-red ( with green border ) flowers are borne on large, rounded, mophead clusters up to 8 inches across. This repeat bloomer blooms heavily during early summer, repeating late summer until autumn frost.
Hardy zones 5 to 8, it is mildew resistant.

* photos taken on Sep 23 2013 in Burtonsville, MD

* photo taken on June 1 2014 @ Maryland Horticulturalist Society garden tour, Ellicott City

* photos taken on July 24 2014 in Columbia, MD

* photo taken on July 5 2015 in Columbia, MD

* photo taken on Aug 24 2015 in Columbia, MD

* photos taken on Sep 8 2017 in Columbia, MD


'Red Sensation'
Compact and rounded, reaching up to 3 x 5 feet, with glossy mid-green foliage borne on deep red stems. Some records include: 4 years - 3 x 3 feet. It is part of the Forever & Ever series.
It is a rebloomer with mophead flowers that begin bright green, turning to bright red then finally to purple.
Hardy zones 5 to 8, it is one of the best red Hydrangeas for the midwestern U.S. and Ontario, Canada.

* photo taken on Nov 14 2016 in Howard Co., MD

* photo taken on July 3 2017 in Elkridge, MD

* photo taken on July 7 2017 in Columbia, MD

* photo taken on Aug 1 2017 in Columbia, MD


'Sea Form'
A lacecap variety with huge flowerheads up to a foot across. They consist of sterile white florets surrounded by blue fertile flowers.
Reaches up to 6 feet in height with gray-green foliage.

'Shamrock'
Reaches up to 5 x 5 feet, bearing double pink ( blue on acidic soil ) lacecap flowers from mid to late summer.
Hardy zones 5 to 8.

'Sister Therese'
Reaches up to 6 x 8 feet with pure white flowers and deep green foliage.
Hardy zones 6 +. Not recommended for full sun where it may scorch and is not especially cold hardy.

* photo taken on June 12 2014 in Clarksville, MD


'Snow Storm'
Compact in habit, reaching up to 4 x 5 feet.
The foliage is deep green.
The white flowers on this repeat bloomer are borne on mophead clusters early summer. They often persist until autumn frost.
Hardy zones 5 to 8.

* photos taken on July 1 2015 in Columbia, MD


'Strawberries and Cream'
Compact in habit, reaching up to 5 x 5 feet, with large leaves and red lacecap flower clusters up to 8 inches across.
Hardy zones 7a + ( possibly 6 on protected site )

* photos taken on July 25 2017 in Columbia, MD

* photo taken on Sep 8 2017 in Columbia, MD


'Sun Goddess'
Compact in habit, reaching up to 4 x 4 feet.
The foliage is intense golden-yellow.
The pink flowers appear during early summer, often persisting into late summer.
Hardy zones 6 to 8

* photos taken on Aug 5 2017 @ Brookside Gardens, Wheaton, MD


'Teller Blue'
Reaches up to 6 x 6 feet, with large leaves and pink to blue ( depending on soil acidity ), lacecap flower clusters up to 8 inches across.
Hardy zones 5a+

* photo taken by Milan Havlis, owner of central Europe's premier plant nursery


'Tokyo Delight'
reaches up to 5 x 6 feet, with lacecap flower clusters that are white on the outside, pink to blue on the inside.

* photos taken on June 23 2013 @ U.S. National Arboretum, DC

* photo taken @ U.S. Botanical Garden, Wash., DC on Aug 25 2014


'Tricolor'
Foliage is green variagated with gray and pale yellow.
The lacecap flowers vary from light pink to blue.
Vigorous in habit, reaching up to 4 feet.

'Twist & Shout'
A repeat blooming Lacecap, rounded in habit, reaching up to 6 x 7.5 ( rarely over 4.5 x 5 ) feet, bearing pink or blue ( depending on soil acidity ) flower clusters.
The mid-green foliage turns to deep red during autumn.
Hardy zones 4 to 9.

* photo taken on June 6 2012 in Howard Co., MD
* photos taken on July 7 2013 in Columbia, MD

* photos taken on June 9 2015 in Columbia, MD

* photo taken on July 1 2015 in Columbia, MD

* photos taken on July 25 2015 @ Niagara-on-the-Lake, Ontario

* photos taken on July 25 2017 in Columbia, MD


'Variegata'
Also called 'Mariesii Variegata'. Reaches up to 5 x 5 feet in 10 years, eventually to 6 x 6 ( rarely over 4.5 ) feet with mid-green foliage that is boldly-margined white.
The lacecap flowers range from pale pink to blue.
Prone to winter dieback, does not bloom well in many areas but is still often used as a foliage shrub.

* photo taken on August 6 2010 in Windsor, Ontario

* photo taken on May 16 2011 in Washington, D.C.

* photo taken on July 13 2011 in Columbia, MD


* photo taken on Sep 15 2011 in Columbia, MD

* photo taken on June 20 2012 in Columbia, MD
* photo taken on July 25 2012 in Columbia, MD

* photo taken on June 18 2013 in Columbia, MD

* photo taken on Aug 24 2015 in Columbia, MD

* photo taken on Aug 16 2017 in Columbia, MD

* photo taken on Nov 7 2017 in Columbia, MD


'Veitchii'
Very vigorous in habit, reaching up to 8 x 12 feet, with luxuriant glossy deep green foliage that is resistant to mildew and turns yellow to red or purple during late autumn ( often remaining deep green long after the first frost ).
The lacecap flowers are white aging to pink with blue-violet fertile flowers. The flowers are borne in clusters up to 4 inches across.
Stem hardy to -6 F.

'Wedding Gown'
A moderate growing, repeat bloomer reaching up to 3 x 5 feet.
The luxuriant foliage is glossy deep green.
The double, pure white flowers appear early summer through mid-autumn.
Hardy zones 5 to 9

* photo taken on Sep 8 2017 in Elkridge, MD


'Westfalen'
Dwarf in habit, reaching up to 4 feet, with mophead flowers that vary from intense crimson-red to dark purple-blue depending on soil acidity.
The foliage is mid-green.

'White Waves'
Vigorous in habit, reaching up to 5 x 10 feet, with attractive glossy deep green foliage that is mildew resistant. The lacecap flowers are white, later aging to pink with blue or pink fertile flowers.

Hydrangea paniculata ( Panicle Hydrangea )
An arboreal Hydrangea that can grow large, up to 40 x 40 feet with a trunk diameter up to 2 feet; though usually closer to 15 feet in the U.S. It is native to Sakhalin, southeastern China and Japan.
The toothed, oval leaves, up to 8 x 4.5 inches, are deep green in summer; turning yellow in the fall.
In late summer it is also covered by large, conical panicles of densely packed white flowers.
Hardy zones 3 to 8 in full sun to partial shade on any moist, deep, fertile, well drained soil. When grown as a small tree, it is best to prune to a scaffold of 3 main trunks and prune out lower or cluttered branches. Not prone to pests or disease but deer will sometimes eat the foliage.


* photo taken on August 2 2010 in Bayfield, Ontario

* photo taken on August 4 2010 in Stratford, Ontario

* photos taken on July 31 2011 in Hyde Park, NY



* photo of unknown internet source

* photo taken on May 7 2014 @ London Town Gardens, Edgewater, MD

* historical archive photos


'Bombshell'
A moderate growing, dense, compact shrub, reaching only 5 x 4 feet in 4 years, with an eventual maximum size of 5.5 x 6 feet.
The foliage is deep green.
The flowers are borne on abundant clusters from mid-summer until autumn frosts.
They are white, aging to deep pink.
Hardy zones 3 to 8.

* photo taken on June 18 2013 in Columbia, MD


'Chantilly Lace'
A large shrub, reaching up to 10 x 10 feet.
The leaves, up to 6 x 4 inches, are glossy very deep green.
The flowers are borne on moderately dense, very large clusters, up to 10 inches in length, from mid-summer to mid-autumn.
They are creamy-white at first, turning to deep pink during autumn.
Hardy zones 3 +.

'Fire & Ice'
Sturdy in habit, reaching up to 10 x 10 feet.
It bears large clusters of flowers that are white, later deepening to pink then deep red.
The flowers persist for over 3 months during summer.
Hardy zones 3 to 8, it is very heat tolerant as well as shade tolerant.

* photos taken on Sep 23 2013 in Burtonsville, MD


'Grandiflora' ( Pee-Gee Hydrangea )
Very vigorous with creamy white sterile flowers borne in huge, dense panicles up to 18 x 12 inches in size.
It can become a very large shrub, reaching up to 25 feet if not pruned. Some records include: 24 years - 18 x 21 feet with a trunk diameter of 1.5 feet.
Blooms are largest on plants thinned and pruned back hard in late winter and kept well fertilized.

* photo taken on Aug 4 2012 in Bayfield, Ontario

* photo taken by Milan Havlis, owner of central Europe's premier plant nursery

* historical archive photos

* photos taken on Apr 6 2016 in Howard Co., MD

* photos taken on Aug 12 2016 in Howard Co., MD


'Honeycomb'
A fast growing, upright, large shrub to small tree, reaching up to 15 x 7 feet. Some records include: 3 years - 12 feet.
The foliage is deep green.
The flowers are borne on huge, pyramidal clusters atop stiff upright stems, all summer long, persisting into early autumn.
They are white, later turning to pink.
Hardy zones 3 +.

'Kyushu'
A moderate growing, upright, medium-sized shrub, reaching up to 10 x 13.5 ( rarely over 8 x 6 ) feet.
Extremely glossy deep green foliage.
White flowers borne in abundant, very large clusters, up to 8 inches in length, from July until first fall frost. The flower clusters turn to pink then finally rosy-purple during autumn.
Hardy zones 4 to 8.

'Limelight'
Fast growing, sturdy yet graceful in habit, reaching up to 6 x 5 feet in 2 years, 8 x 8 feet in 10 years, eventually to 12 x 10 feet or more ( easily pruned smaller ). It makes an excellent focal point as well as a great natural hedge.
The very abundant, huge, flower clusters, up to 12 x 10 inches, are greenish-white to bright lime-green, later turning to rich deep pink. The blooming season last from late July through autumn.
The thick foliage is deep green, turning to yellow-green or less often red-purple during autumn.
Hardy zones 3 to 8. Plants cut back 1/3 to 1/2 during early spring are more vigorous and have larger flowers.

* photos taken on 4th of July 2010 @ U.S. National Arboretum, D.C.



* photo taken on July 13 2011 in Columbia, MD

* photo taken on Aug 20 2011 @ Brookside Gardens, Wheaton, MD

* photo taken on June 1 2014 @ Maryland Horticulturalist Society garden tour, Clarksville

* photo taken on July 25 2015 @ Niagara-on-the-Lake, Ontario

* photo taken on Sep 2016 in Annapolis, MD

* photos taken on Aug 5 2017 @ Brookside Gardens, Wheaton, MD


'Little Lamb'
Moderate growing and compact in habit, reaching a maximum size of 8 x 10 feet, with very abundant, sterile, pure white, compact but dense flower clusters. The blooming season last up to 12 or more weeks from mid summer into early autumn and the flowers eventually fade to pink.
The mid-green foliage turns to yellow-green or sometimes red-purple during autumn.
Hardy zones 3 to 8, blooming is improved by hard pruning during early spring.
Drought and urban tolerant.

* photo taken on July 31 2011 in Hyde Park, NY

* photos taken on Aug 3 2012 in London, ON


'Little Lime'
The moderate growing, dwarf form of 'Limelight', reaching a maximum size of only 5 x 6 feet, with huge greenish-white flower clusters, up to 8 inches, borne on strong sturdy stems. The flower clusters are greenish-white, later turning to pink and burgundy-red. The blooming season last from summer well into fall, totaling up to 16 weeks or more.
The foliage is deep green.
This mounding shrub makes an excellent Hydrangea for the urban or townhouse garden and can even be used in pots.
Hardy zones 3 +. It can be kept even smaller by cutting close to the ground during late winter.

'Pee Wee'
A compact, rounded, small to medium-sized shrub, reaching up to 8 x 10 ( rarely over 5 ) feet. It is great for containers.
The leaves, up to 5 inches in length, are deep green.
The flowers are borne on panicles, up to 8 inches in length, early summer until autumn frost.
They are white, later turning to pink by autumn.
Hardy zones 4 +.

* photos taken on Aug 12 2016 in Howard Co., MD


'Phantom'
A very fast growing, upright, large shrub to small tree, reaching up to 10 x 10 feet.
The attractive, lush foliage is deep green.
The flowers are borne in abundant, huge, dense, conical flowerheads, up to 18 x 8 inches. They are white at first, later turning to pale pink by early autumn.
The flower clusters are borne on very thick, sturdy stems from mid-summer to early autumn.
Hardy zones 3 to 7.

* photo taken on Sep 3 2017 @ U.S. National Arboretum, D.C.


'Pink Diamond'
A large shrub, reaching up to 10 x 10 feet in 10 years with an eventual size of 10 x 12 + feet.
Flowers borne in large pyramidal panicles, up to 12 x 8 inches in size, are pink in bud opening to white then deepening to rich pink to nearly red. The flowers appear mid-summer to mid-autumn.
Hardy zones 4 to 7.

* photo taken on Sep 3 2017 @ U.S. National Arboretum, D.C.


'Pinky Winky'
Compact in habit, reaching up to 6.5 x 5.5 feet in 3 years, 8 x 6 feet in 10 years, with an eventual maximum size of 8 x 10 feet. It makes a great natural hedge.
The foliage is deep green.
The pale pink flowers are borne on huge clusters, up to 16 x 8 inches in size.

* photos taken by Milan Havlis, owner of central Europe's premier plant nursery

* photo taken on Oct 6 2016 in Howard Co., MD


'Praecox'
It flowers early with mostly sterile flowers but the panicles aren't especially large, up to 8 inches in length.
It reaches the same size as regular Hydrangea paniculata.
The foliage turns striking yellow in autumn.

'Quickfire'
A very fast growing, large shrub, reaching up to 8 x 10 feet in 5 years, eventually somewhat larger. Some records include: fastest growth rate - 4.5 feet.
The fragrant flowers are borne on large panicles, up to 12 inches in length, all summer long, persisting into early autumn for a season often exceeding 3 months. They are bright white at first, later turning to mid-pink, then finally rosy-pink.
The stems are reddish.
Hardy zones 4a +

* photo taken on Aug 20 2011 @ Brookside Gardens, Wheaton, MD

* photo taken on Oct 2 2016 in Bel Air, MD

* photos taken on Aug 5 2017 @ Brookside Gardens, Wheaton, MD


'Sweet Summer'
A vigorous but compact, medium-sized shrub, reaching a maximum size of 6 x 6 feet.
The leaves turn to yellow or purple during autumn.
The flowers are borne on extremely abundant, dense clusters, up to 5 inches in length, from early summer until mid-autumn.
They are white at first, later deepening to pink. Flower clusters of both colors are often found on the same plant at a time.
The flower panicles are borne on very strong stems.
Hardy zones 4 +.

'Tardiva'
Moderate growing, it can reach up to 6.5 x 4 feet in 4 years, 10 x 10 feet in 10 years, 15 x 17 feet at maturity.
The deep green foliage turns deep yellow during autumn.
It blooms very late in season, sometimes as late as September, and has white sterile flowers that fade to pink that are borne on very strong stems.
Very hardy, thriving even in Alberta's harsh climate.

* photo taken on Aug 20 2011 @ Brookside Gardens, Wheaton, MD

* photo taken on Aug 25 2011 @ Scott Arboretum, Swarthmore, PA

* photo taken on Feb 8 2014 @ U.S. National Arboretum, DC


'Unique'
Rounded flower panicles even larger than that of 'Grandiflora' ( up to 16 x 10 inches ). The flowers borne in large, dense clusters, up to 10 x 6 inches, that are white turning to deep pink with age.
A dense, domed, large shrub, to small tree, reaching up to 14 feet or more. Some records include: 14 years - 11 x 13 feet; 36 years - 15 x 25 feet with a trunk diameter of 15 inches.
The foliage is deep green.
Hardy zones 4 to 8.

'Vanilla Strawberry'
A large, upright shrub, reaching up to 7 x 7 feet or slightly more.
It bears huge conical flowerheads, up to 10 inches in length, that are white during summer, fading to pink-red during autumn. The blooms persist for over 2 months. It often bears blooms of multiple colors as new flower clusters continue to be produced during the summer as others age.
The deep green foliage turns yellow in fall.
Hardy zones 3 to 8.

* photo taken on Sep 23 2013 in Burtonsville, MD

* photo taken on Oct 13 2016 in Annapolis, MD

* photo taken on Oct 23 2016 in Annapolis, MD

* photo taken on May 4 2017 in Columbia, MD

* photos taken on May 17 2017 in Annapolis, MD

* photos taken on Aug 5 2017 @ Brookside Gardens, Wheaton, MD


'White Moth'
A very fast, growing, large shrub, reaching up to 13 x 8 feet. Some records include: 2 years - 7 feet.
The foliage is glossy deep green.
The flowers are borne on very abundant, very large clusters, up to 16 x 10 ( rarely over 12 x 9 ) inches in size, from mid-summer until autumn frost.
They are white, later turning to pale green.
Hardy zones 4 +.

Hydrangea petiolaris ( Climbing Hydrangea )
A rapid growing deciduous, aerial rooting self clinging vine reaching up to 70 feet in height and 50 feet across. Some records include: fastest recorded growth rate - 10 feet; 10 years - 30 x 8 feet; 12 years - 40 feet; 20 years - 80 feet; largest on record - 104 x 80 feet.
The finely toothed, oval, pointed leaves, are up to 6 x 4 inches in size.
The foliage is glossy deep green above turning to yellow late in autumn ( typically November )
The white flowers are borne in flat corymbs up to 10 inches across.
The warm orange-brown, flaking bark is attractive in winter.
Hardy zones 3 to 8, is pest free and thrives in sun or shade on most moist, fertile soils. Tolerant of alkaline soil conditions. Difficult to transplant unless very small, the Climbing Hydrangea may be slow growing until full establishment.
Easily propagated by seed sown on moist soil or less easily by softwood cuttings in summer.

* photo taken on March 28 2010 @ U.S. National Arboretum, D.C.

* photo taken on April 11 2010 @ U.S. National Arboretum

* photo taken on April 11 2010 in Columbia, MD

* photo taken on May 8 2010 @ U.S. National Arboretum, D.C.

* photos taken on May 8 2010 @ McCrillis Gardens, Bethesda, Maryland


* photos taken on May 16 2010 @ Cylburn Arboretum, Baltimore, MD


* photo taken on annual Horticultural Society of Maryland Garden Tour




* photo taken on August 3 2010 @ University of Guelph Arboretum, Ontario

* photos taken on May 26 2014 in Columbia, MD

* photo taken on Nov 19 2016 @ London Town Gardens, Edgewater, MD

* photo taken on May 4 2017 in Columbia, MD

* photos taken on May 16 2017 in Columbia, MD

* photo taken by Dr. Nick V. Kurzenko @ CalPhotos


'Mirranda'
Leaves boldly edged in golden-yellow.
The flowers are white.
Slower growing than species but still reaching up to 30 feet or more.

'Skyland Giant'
Glossy deep green foliage and huge flower heads up to 12 inches across.
The foliage persists late into autumn.
The attractive flaking bark is tan color.

'Variegata'
Wide yellow leaf margins

Hydrangea quercifolia ( Oakleaf Hydrangea )
A fast growing, large, suckering rounded shrub native to the southeastern U.S. from Tennessee to Georgia and south. Some records include: 3 years - 9 feet; largest on record - 16 x 17 feet.
The large 5 to 7 lobed leaves, up to 12 x 12 inches somewhat resemble Quercus velutina - Black Oak in outline. They are medium green above, downy beneath and turn to spectacular shades of red, orange and purple late in autumn, sometimes persisting through the winter.
The foliage is very frost tolerant both during spring and fall and can tolerate as low as 15 F without damage.
The flowers are borne in pyramidal panicles up to 13 x 6 inches, during summer and are white later turning pinkish in autumn.
The attractive stems with orangish peeling bark is an excellent winter feature.
Hardy zones 5 to 9 ( possibly 4 if sheltered and wood is well ripened after a hot summer ) in full sun to partial shade. It prefers acidic to neutral, fertile, moist, well drained soil ( does not tolerate saturated, poorly drained soil ) and a climate with hot humid summers. Established plants are drought, salt and dry shade tolerant. Fertilize with an all purpose fertilizer regularly throughout the growing season. Young plants tend to be not as cold hardy and should be sheltered in zones 5 and 6 for their first few winters ( wrapping in burlap for first winter is an option ). Can be pruned to be kept compact and far smaller than their natural size. Insect problems almost never exists and leaf spot is rare other than on containerized plants with very frequent overhead watering. Propagation is easy from seed which are sprinkled on top of potting mix, placed under mix and will germinate sometime between 2 weeks and a month. Pay close attention to moisture until the seedlings reach 1 inch in height. Cultivars can also be reproduced via cuttings and tissue culture.



* photo taken on April 11 2010 in Columbia, MD

* photo taken on May 6 2010 in Clarksville, MD


* photo taken on annual Horticultural Society of Maryland Garden Tour








* photo taken on August 3 2010 @ University of Guelph Arboretum, Ontario


* photo taken on Oct 14 2010 @ Crownsville, MD

* photo of unknown internet source

* photo taken on June 7 2011 in Columbia, MD

* photo taken on Aug 4 2012 in Bayfield, Ontario

* photo taken on Sep 7 2012 in Ellicott City, MD

* photo taken on May 20 2014 in Columbia, MD

* photo taken on Aug 3 2014 @ National Zoo, DC

* photo taken on Mar 1 2017 in Columbia, MD


'Alice'
Fast growing, reaching a maximum size of 13 x 17 feet with huge leaves up to 15 x 16 inches. Some records include: 4 years - 6 x 6.6 feet.
The deep green foliage turns to deep red in autumn.
The flower clusters are also huge, up to 24 ( rarely over 14 ) inches in length. Very heat tolerant and more sun tolerant than other cultivars.

* photo taken on Aug 24 2011 in Columbia, MD

* photos taken on June 7 2011 in Columbia, MD

* photos taken on June 21 2012 in Columbia, MD
* photo taken on July 15 2012 in Columbia, MD

* photo taken on Sep 7 2012 in Columbia, MD

* photos taken on June 12 2013 in Columbia, MD

* photo taken on June 16 2013 in Columbia, MD

* photos taken on June 11 2014 in Columbia, MD

* photos taken on June 15 2014 in Columbia, MD

* photo taken on Aug 1 2014 in Columbia, MD

* photos taken on Oct 1 2014 in Howard Co., MD

* photos taken on June 24 2015 in Columbia, MD

* photo taken on July 9 2015 in Columbia, MD

* photos taken on Aug 24 2015 in Columbia, MD

* photo taken on Oct 27 2015 in Columbia, MD

* photo taken on June 25 2017 in Columbia, MD


'Allison'
Very vigorous, it reaches a maximum size of 12 x 17 feet.
The huge leaves that are luxuriant deep green turning to glowing deep red in autumn.
The flower clusters are are similar to 'Alice' but are more upright.

* photos taken on June 23 2014 in Columbia, MD

* photos taken on June 3 2017 in Columbia, MD


'Amethyst'
Compact growing, reaching up to 8 x 8 ( rarely over 6 ) feet in 10 years.
The deep green foliage turns to red and red-purple in autumn.
The creamy-white flowers are borne in upright clusters up to 6 inches in length and turn to glowing red with age holding their color when dry.

* photo taken by Milan Havlis, owner of central Europe's premier plant nursery


'Dayspring'
Vigorous growing with large, pure white flowerheads.
The foliage turns to deep red during autumn.

* photo taken on Apr 23 2017 @ Brookside Gardens, Wheaton, MD

* photo taken on June 3 2017 in Columbia, MD

* photos taken on Aug 5 2017 @ Brookside Gardens, Wheaton, MD


'Ellen Huff'
Vigorous, heat tolerant form originating from the Gulf Coast.
The foliage turns to purplish-red during autumn.
The white flowers are borne in panicles up to 12 inches in length.

* photos taken on Aug 24 2017 @ U.S. Botanic Garden, Wash. DC.


'Gatsby Gal'
Compact in habit, reaching up to 6 x 6 feet.
The foliage turns to brilliant red during autumn.
The abundant, huge flower panicles are creamy-white at first, turning to rosy-pink.
Hardy zones 5+.

'Gatsby Pink'
Vigorous and dense in habit, reaching up to 10 x 10 feet.
The deep green foliage turns to deep red during autumn.
The abundant, huge flower panicles are pure white at first, turning to mid-pink.
Hardy zones 5+.

'Gloster Form'
Vigorous, exceptionally heat tolerant form originating in Louisiana.

'Harmony'
Reaches up to 12 x 10 feet with deep green foliage which turns to deep red during autumn.
The extremely double, large, white flowers are borne in huge, dense panicles, up to 12 x 8 inches, that weigh up to a pound each. The heavy flower panicles that weigh down the branches eventually deepen to pale pink.
Hardy zones 5 to 9

* photo taken by Milan Havlis, owner of central Europe's premier plant nursery


'Ice Crystal'
Reaches up to 6 x 6 feet, with attractive deeply-cut foliage that turns to deep red during autumn.
The flowers appear during early summer and persist into early autumn. They start out white but then deepen to pink.
Hardy zones 5 to 8.

* photo taken on Aug 5 2017 @ Brookside Gardens, Wheaton, MD


'Jetstream'
A moderate growing, sturdy-branched, dense, compact, medium-sized shrub, reaching up to 6 x 5 feet in size.
The glossy deep green foliage turns to intense orange-red during autumn. The foliage is resistant to leaf spot.
The flowers on upright, pyramidal panicles are white turning to deep pink.
Hardy zones 5 to 8.

* photo taken on Oct 5 2015 in Columbia, MD


'Little Honey' ( Golden Oakleaf Hydrangea )
A golden-yellow foliaged sport of "Peewee', reaching up to 4 x 4 feet in 8 years, eventually slightly more. The foliage turns intense red in autumn.
The white flowers are borne on pyramidal panicles up to 5 inches in length.
The attractive stems are reddish-brown.
Hardy zones 5 to 9.

* photo taken on June 1 2014 @ Maryland Horticulturalist Society garden tour

* photos taken on Apr 23 2017 @ Brookside Gardens, Wheaton, MD

* photo taken on Aug 5 2017 @ Brookside Gardens, Wheaton, MD


'Munchkin'
A true dwarf, smaller in all its parts and only reaching up to 3 x 4.5 feet in 5 years, eventually up to 5 x 6 feet. It is dense and compact in habit.
The deep green foliage turns intense deep red during autumn.
The flowers are borne on upright clusters, up to 6.5 inches long, during early summer. They are white at first, later deepening to mid-pink.

* photos taken on June 30 2013 @ U.S. National Arboretum, DC

* photo taken on Apr 23 2017 @ Brookside Gardens, Wheaton, MD


'Pee Wee'
Dwarf and compact in habit, reaching up to 3 feet in 6 years; 5 x 5 feet in 10 years, may eventually grow broader to about 6 x 7 feet. Some records include: fastest growth rate - 2 feet. It was originally discovered in the sand hills of Alabama.
The leaves are up to 8 x 7 ( rarely 14 x 15 ) inches in size. The deep green foliage turns to rose-red to purple during late autumn.
The white flowers are borne in clusters up to 7 ( rarely 12 ) inches in length.

* photos taken on June 30 2013 @ U.S. National Arboretum, DC

* photo taken on July 11 2014 @ Smithsonian Inst., Washington, DC


'Queen of Hearts'

* photo taken on May 21 2017 in Columbia, MD


'Ruby Slippers'
Dense and dwarf in habit, reaching only around 3.5 x 5 feet in 5 years, 4 x 6.5 feet in 10 years, eventually to 6 x 7 feet.
The sturdy, upright flower clusters, up to 10 inches in length, are pale pink, later deepening to deep rosy-red.
The foliage is deep green, turning to deep red during autumn. The foliage is dense due to the short internodes between the leaves.
Hardy zones 5 to 8. It is very resistant to root rot.

* photo taken on July 9 2015 in Columbia, MD

* photos taken on Oct 16 2015 in Columbia, MD

* photo taken on Oct 26 2015 in Columbia, MD

* photos taken on June 3 2017 in Columbia, MD

* photos taken on June 14 2017 in Howard Co., MD

* photos taken on Aug 5 2017 @ Brookside Gardens, Wheaton, MD

* photo taken on Aug 5 2017 @ Brookside Gardens, Wheaton, MD

* photo taken on Nov 3 2017 in Howard Co., MD


'Semmes Beauty'
Vigorous ( to 10 x 12 feet or more ) and exceptionally heat tolerant form with large, white flower inflorescences.

'Sikes Dwarf'
A dwarf bushy form only reaching up to 3 x 4 feet in 10 years and eventually to 4 x 6 feet.
The leaves are very large, up to 12 inches wide. The deep green foliage turns rich burgundy-red in autumn.
The white ( later fading to pink ) flowers are borne in clusters up to 12 inches in length.
Hardy zones 5 to 8.

* photo taken on July 17 2010 @ Morris Arboretum, Philly, PA

* photo taken on Aug 25 2011 @ Scott Arboretum, Swarthmore, PA

* photo taken on June 1 2012 in Columbia, MD * photos taken on June 8 2012 in Columbia, MD

* photos taken on June 12 2013 in Columbia, MD

* photo taken on June 10 2013 in Columbia, MD

* photo taken on June 18 2013 in Columbia, MD

* photo taken on Sep 29 2013 in Laurel, MD

* photo taken on Nov 22 2013 in Columbia, MD

* photos taken on June 9 2015 in Columbia, MD

* photos taken on July 9 2016 in Columbia, MD

* photos taken on May 16 2017 in Columbia, MD

* photo taken on Oct 3 2017 in Columbia, MD


'Snowflake'
Vigorous growing, reaching up to 8 x 8 feet in 10 years and known to eventually reach over 10 x 12 feet.
The very showy, double white flowers are borne in panicles up to 15 inches in length. The older flowers turn to pink.

* photo taken on June 22 2014 in Clarksville, MD

* photo taken on June 20 2015 in Columbia, MD

* photos taken on Aug 5 2017 @ Brookside Gardens, Wheaton, MD


'Snow Queen'
Compact in habit, reaching up to 10 x 14 ( rarely over 6 ) feet. Some records include: 10 years - 6 x 6 feet.
The deep green leaves, up to 8 inches in length, turn spectacular deep red-purple during fall.
The sterile white flowers are borne in huge dense clusters, up to 14 inches in length, on strong stems that do not flop. The flowers persist all summer, deepening to pink by late summer then drying to tan in early autumn.
Thrives in sun or shade and tolerates down to -22 F or colder.

* photos taken on June 7 2011 in Columbia, MD

* photo taken on Aug 15 2012 in Columbia, MD

* photos taken on Dec 14 2012 in Columbia, MD

* photos taken on June 15 2014 in Columbia, MD

* photos taken @ Smithsonian Inst, Wash., DC on Aug 25 2014


* photo taken on Oct 23 2014 @ Smithsonian Inst., Wash. DC

* photos taken on June 24 2015 in Columbia, MD

* photo taken on Aug 24 2015 in Columbia, MD

* photo taken on Sep 8 2015 in Columbia, MD

* photo taken on Oct 5 2015 in Columbia, MD

* photos taken on Dec 6 2015 in Columbia, MD

* photo taken on June 24 2016 in Columbia, MD

* photo taken on Apr 12 2017 in Columbia, MD

* photos taken on June 9 2017 in Columbia, MD

* photo taken on June 25 2017 in Columbia, MD


Hydrangea sargentiana ( Sargent's Hydrangea )
A rare, suckering, upright shrub native to China that reaches a maximum size of 12 x 12 ( rarely over 8 ) feet.
The large tropical-looking leaves, up to 12 x 8 inches in size, are velvety dull deep green above and bristly below.
The flat-topped huge flowerheads up to 10 inches across are borne during late summer and consist of sterile lilac pink flowers surrounded by pink fertile flowers.
The young shoots are bristly and hairy.
Hardy zones 6 to 10 ( to 4b as perennial ) and prefers to be shaded from hot midday sun. In the far northern reaches of its adaptation in areas such as the Ottawa Valley of Canada, it is cut back to a foot or less in height, then pushed up attractive new growth to 3 feet in height however with no flowers.

Hydrangea seemanii
An extremely rare strong growing, aerial rooting evergreen vine reaching up to 50 x 17 feet that is native to high elevations of the Sierra Madre Mountains in Mexico. Without support, it is sometimes found as a large upright shrub.
Fast growing and quick to establish, it can easily increase at over 4 feet per year.
The thick, elliptical leaves, up to 8 x 2.5 inches in size look more like that of an evergreen Magnolia than that of a Hydrangea. The leathery foliage is very glossy deep green.
The flowers are borne in clusters up to 6 inches across.
Hardy zones 8 to 9 ( reports of 7 are unconfirmed ). Hardy far north of its native range in oceanic climates such as London, England and lower elevations of the Pacific Northwest.

Hydrangea serrata
A fast growing, dense, bushy, medium-sized, deciduous shrub closely related to Hydrangea macrophylla that reaches a maximum of 7 x 7 feet. It is native to Korea as well as central and southern Japan.
The toothed, pointed, oval leaves are up to 6 x 2.5 inches. The foliage is bright green and turns to red during autumn.
The lacecap flowers up to 6 inches across are borne in summer and are variable in color from pink to blue.
Hardy zones 5 to 9 ( hardiness varies depending upon seed source ) in partial to full shade. It is tolerant of heat and salt spray but drought. Stem dieback begins on most cultivars at -10 F though regeneration occurs during spring ( often without summer flowering ). This Hydrangea like H. macrophylla can be influenced in bloom color by soil acidity. The more acidic the soil, the more blue the flowers on some cultivars. Foliage is more mildew resistant than Hydrangea macrophylla.

* photo taken on Oct 17 2014 in Columbia, MD

* photo taken on Oct 8 2016 in Columbia, MD

* photos taken on June 20 2017 in Columbia, MD

* photos taken on Oct 28 2017 in Columbia, MD


'Beni-Gaku'
A shrub, reaching up to 5 x 5 feet.
The deep green foliage turns to deep red during autumn.
The flowers are white, later deepening to reddish-pink. They are borne on abundant, lacecap clusters, up to 5.5 inches wide, on previous years wood from mid-summer to early autumn.
Hardy zones 5 to 8 in partial to full shade.

* photos taken on June 30 2013 @ U.S. National Arboretum, DC


'Blue Billow'
Of Korean seed source and compact in habit, it reaches up to 5 x 10 feet, is more cold heady with larger, deep green foliage and rich blue lacecap flowers. The very profuse blooms are long lasting, it will even bloom on some years in zone 5, yearly in zone 6. The aged flowers turn to deep red and so do the leaves in autumn.

* photos taken on June 16 2015 in Columbia, MD

* photo taken on June 25 2017 in Columbia, MD


'Bluebird'
Vigorous growing and reaching up to 7 x 8 ( rarely over 5 ) feet with thick stems and attractive foliage that turns to red in autumn. The lacecap flowers are light rich blue in color are borne over a long season.
It is among the hardiest cultivars and thrives in zone 4b Ottawa, Ontario.

* photo taken on annual Horticultural Society of Maryland Garden Tour

* photos taken on June 17 2011 in Columbia, MD





'Golden Sunlight'
Compact in habit, reaching up to 4 x 5 feet.
Foliage is golden-yellow at first in spring, later turning to green.

'Grayswood'
Vigorous, reaching up to 6 x 7 feet.
It bears lacecap flower heads that have blue-purple fertile flowers that are surrounded by sterile florets that change from white to crimson red.
The flowering begins early summer and persists until autumn frost.
The foliage is deep green and progressively turn red-brown beginning at the tips during late summer.
It is among the hardiest of cultivars, thriving in zone 4b Ottawa, Ontario.

'Preziosa'
Upright in habit, reaching up to 6 x 6 feet with red stems and reddish young foliage. The foliage turns attractive red and purple during autumn unless attacked by mildew which it is prone to.
The small, rounded flower heads turn from creamy white to pink then red then purple.
Hardy north to zone 5, it is very sun tolerant.

* photo taken on June 8 2012 in Howard Co., MD
* photo taken on July 10 2013 in Howard Co., MD

* photo taken by Milan Havlis, owner of central Europe's premier plant nursery

* photo taken @ U.S. Botanical Garden, Wash., DC on Aug 25 2014

* photo taken on Aug 24 2017 @ U.S. Botanic Garden, Wash. DC.


'Tuff Stuff'
Compact in habit, reaching up to 3 x 3 feet.
The reddish-pink to purplish-blue ( depending on soil acidity ) lacecap flowers appear early summer into mid-autumn on this repeat bloomer.
Hardy zones 5 to 8.

Hydrangea serratifolia
A strong growing vine native to Chile and Argentina that reaches up to 100 feet and is similar to Hydrangea seemanii.
The elliptical leaves are up to 6 x 3 inches. The foliage is deep green.
The white flowers are all fertile and are borne in clusters up to 6 inches across.
Hardy zones 6 to 10 though preferring a maritime climate.

Hydrangea sikokiana ( Japanese Oakleaf Hydrangea )
A very beautiful, slow growing, open, spreading Hydrangea reaching a maximum size of 10 x 10 feet, that is native to high mountains of Kyushu, Shikoku and western Honshu, Japan.
The sharply serrate edged and lobed leaves are much like that of Hydrangea quercifolia but are much more shallowly lobed. The leaves are typically up to 10 x 9 inches in size but may be massive, up to 15 inches and borne in leafstalks up to 6 inches in length, on vigorous shoots on plants growing in ideal conditions.
The foliage is coarsely felted on both sides and is light to deep green above and paler beneath.
White flowers are borne in massive panicles up to a foot across in July.
Young branches are stout and older branches have attractive exfoliating bark.
Hardy zones 7 to 8 in sun or shade and is highly recommended for the Pacific Northwest, unlikely to thrive in the hot, humid southeast.
Propagation is from cuttings taken in the second half of July.

Hydrangea xanthoneura
Very similar to Hydrangea arborescens. It is its Asian counterpart, native to southwest China.
It is a fast growing, deciduous large shrub or rarely small tree up to 23 x 17 feet in height.
The leaves, up to 7 x 4 inches in size, are deep green.
The white flowers are borne in clusters up to 9 inches across.
Hardy zones 5 to 9 in partial shade on moist, well drained soil.

* photos taken on June 23 2013 @ U.S. National Arboretum, DC

* historic archive photo


RELATED PLANTS

DEINANTHE ( False Hydrangea )
A small genus consisting of 2 species of thick-rhizomed, clumping, bushy perennials that are closely related to Hydrangeas. The main difference is that all true Hydrangeas are woody plants. They are native to mountain forests in China and Japan.
They make very attractive addictions to the shaded rock garden as well as more natural woodland gardens.
The toothed, deeply-veined, oval leaves are up to 4 inches in length.
The rough-textured foliage is deep green.
The cup-shaped, nodding flowers are borne on loose terminal clusters during late summer to early autumn. They are usually either pale purple, pink or white.
The False Hydrangea is slow to establish and usually doesn't bloom until the second year after planting...however well worth the wait.
The roots are edible and so are the leaves which can be cooked and eaten.
It could even be used as a potential food crop in woodland areas if the leaves are harvested late in the season as to not rob the plant of too much nutrients.
They prefer partial to full shade ( full sun will scorch the leaves ).
Clumps can be divided during spring. Seed can be surface sown upon ripening in a greenhouse, keep the soil medium consistently moist and at 65 F and germination should occur between 1 and 2 months.

Deinanthe bifida ( Japanese False Hydrangea )
A vigorous, woody-based perennial, reaching up to 2.3 x 2 feet, it appears like a herbaceos Hydrangea macrophylla. It is native to mountain forests in Japan.
The toothed, oval leaves, up to 6 x 6 inches in size, are luxuriant bright green. The leaves are often notched at the tip.
The very abundant, white flowers, up to 0.4 inches in length, appear mid to late summer.
Hardy zones 4 to 7 on moist, fertile soil.

* photos taken on June 30 2013 @ U.S. National Arboretum, DC


'Pink'
A pink flowering form.

Deinanthe caerules 'Blue Wonder' ( Chinese False Hydrangea )
A slow spreading, low perennial, reaching up to 2 x 2 feet, that is native to moist mountain forests of western Hubei province in China. It usually takes about 4 years for a plant to reach mature size.
The huge, deeply-veined, toothed, felted leaves, up to 10 x 6.5 inches, are slightly glossy, deep green.
Each stem usually has around 4 leaves crowded towards the tip.
The large lavender-blue flowers, up to 2 inches across, are borne on clusters, up to 6 inches across, from early to mid summer. It blooms over a very long season with a succession of blooms.
Hardy zones 4 to 8 ( possibly even 3 ) in partial shade in fertile, moist woodland conditions protected from wind. Sounds like alot but it is actually easy to grow in the average woodland garden...thrives in acidic, alkaline, clay or sand as long as it's well drained.

SCHIZOPHRAGMA
A small genus of vining plants that are very closely related to the climbing Hydrangeas.

Schizophragma corylieum
A very rare deciduous climbing Hydrangea, reaching up to 30 feet in height. Some records include: 10 years - 20 feet.
The finely-toothed, ovate leaves are glossy mid-green. The creamy-white flowers are borne on flat lacecap clusters during early summer.
Older stems have attractive bright brown exfoliating bark.
Hardy zones 5 to 8 in full sun to partial shade.

Schizophragma elliptifolium ( Elliptic Hydrangea Vine )
A self-clinging deciduous vine, reaching up to 15 feet, that is native to mountain slopes in Guizhou, Sichuan and Yunnan Provinces in southern China.
The elliptical leaves are up to 5 x 2.8 inches in size. The thick but papery foliage is deep green above, gray-green beneath.
The creamy-white, lacecap flowers appear during early summer.
The twigs are reddish-brown.
Hardy zones 6 to 9 in full sun to partial shade.

'Lacy Hearts'
Very attractive gray-green foliage that is splashed and bordered creamy-white.

'Red Rhapsody'
Very attractive glossy red new foliage during spring.

Schizophragma hydrangeoides ( Japanese Hydrangea Vine )
A large, vigorous, aerial-rooting vine native to Korea and Japan that reaches up to 60 feet or more whether climbing wall or tree trunk. Some records include: fastest recorded growth rate - 5 feet; largest on record - 80 x 40 feet on wall.
The coarsely-toothed, deciduous leaves, up to 7 x 6 inches are glossy mid-green in summer turning golden-yellow during autumn.
The small white flowers are borne in large flat cymes up to 12 inches across that also include some white bracts up to 1.6 inches long. They appear late spring into early summer.
Hardy zones 5 to 8 in sun or partial shade on light, moist, well drained, fertile soil. May be slow growing until it becomes established. Pruning is not generally needed except to dead head old blooms and to cut out dead or weak growth in late winter. Easy to grow, it is not generally bothered by pests or disease. Propagation is from layering, semi-ripe cuttings taken mid to late summer or seed sown during spring.

'Moonlight'
Silvery-blue foliage that turns to orange in autumn.

* photos taken on May 6 2010 @ Brookside Gardens, Wheaton, MD



* photo taken on May 8 2010 @ U.S. National Arboretum, D.C.




* photo taken on May 8 2010 @ McCrillis Gardens, Bethesda, Maryland

* photo taken on 4th of July 2010 @ U.S. National Arboretum, D.C.

* photos taken on June 23 2013 Z@ U.S. National Arboretum, Washington DC


'Roseum'
Similar to species except for having pink rather than white flower bracts.

Schizophragma integrifolium
A large vigorous vine native to central China that can reach up to 66 or very rarely 80 feet in height.
The deciduous, oval, bright green leaves, up to 8 x 5 inches, are edged with very small teeth or no teeth at all.
The flowers are borne in cymes up to 12 inches across and include white bracts up to 10 inches in length.
Hardy zones 5 to 9 in sun or shade. This Hydrangea loves hot summers and its foliage in sun yet is roots in cool, fertile soil therefore mulching is recommended.
Propagation is from seed in spring or from softwood or semi-ripe cuttings taken in summer.

'Faurei'
A rare but most spectacular vine, that is native to Taiwan.
It is similar to the above, except the huge white flower clusters, up to 12 inches across, include white sepals up to 3 inches in length.

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