Thursday, July 29, 2010

Pampas Grass

Cortaderia

An excellent architectural focal point plant or screen for full sun on deep, well drained soil with the added benefit of being deer resistant.

Cortaderia araucana
Similar to Cortaderia sellowana but is hardier, likely tolerating much lower than 0 F.

Cortaderia richardii ( New Zealand Pampas Grass )
Rarely grown in North America; this New Zealand native forms HUGE clumps with arching stems reaching up to 20 x 10 feet! It is found in swamps and along riverbanks in its native range.
The white flowers plumes are borne late summer into early fall.
Hardy north to zone 7. It is native to swampy places and lowlands and prefers full sun on moist, light soil.

Cortaderia sellowana ( Argentine Pampas Grass )
Native to Argentina and commonly cultivated in the southern and Mid Atlantic U.S.
The Argentine Pampas Grass is among the most regal and stately of all ornamental grasses reaching up to 12 ( record is 20 ) x 13 feet with huge silvery-white plumes reaching up to 40 inches in length. The plumes look great against a dark background.
The arching, saw-toothed leaves, up to 9 feet in length, are blue-green.
The foliage is evergreen in mild climates but turns herbaceous in colder winter climates.
Hardy zone 7 to 10. It can survive zone 7 winters with the clumps tied up and the root zone mulches well but is not hardy farther north. Do not cut back until early spring. For zones 5 and 6 check out some of the cultivars below. Not only is it drought tolerant, but the Argentine Pampas Grass has invasive potential in dry summer Medeiterranean Regions of California, Europe and New Zealand.
Deer and rabbit resistant. Salt tolerant.

* photo taken by John D. Guthrie @ USDA-NRCS PLANTS Database


'Andes Silver'
Compact habit to 5 x 5 feet with prolific, large creamy white flowers plumes reaching a height of 7 feet. Hardier than regular Pampas Grass, thriving from zones 5 to 10

* photos taken on July 28 2010 in Columbia, MD



* photo taken on Aug 18 2011 in Columbia, MD
* photos taken on July 27 2012 in Columbia, MD


'Gold Band'
Reaches a maximum size of 8 x 8 feet, with foliage that is striped golden-yellow.

'Pumila' ( Dwarf Pampas Grass )
Almost "dwarf", with foliage reaching up to 5 x 5 feet and profuse, creamy white flower plumes reaching up to 7 feet. It has been reported to be hardier than the species to zone 6, even surviving north into zone 5 on sheltered sites with a pine mulch.

'Rosea' ( Pink Pampas Grass )
Tall with stately foliage reaching up to 8 x 13 with stunning rosy-pink plumes reaching a maximum height of 12 feet in late summer and fall. Very fast growing, can reach 8 feet in a single season from a gallon size plant.
Evergreen north to zone 7; surviving into zones 5 and 6 as a deciduous perennial if on a protected site and under a light mulch ( pine needles work, leaves or mulch might smother the crown ).

'Sunningdale Silver'
Gigantic, reaching a maximum size of 20 x 13 ( usually about half that ) feet, with strong stems bearing very abundant flower plumes.

'Usballata'
Grown for its huge ivory white plumes reaching up to 7 feet in height plus its extra winter hardiness ( fully hardy north into zone 6 ). It was originally discovered in the Andes foothills in Argentina in a village called Usballata.

Tuesday, July 27, 2010

Paliurus - Christ's Thorn

Paliurus hemsley
native to China is similar to the more well known P. spina-christi but much larger in size and foliage. It is a small to medium size tree with the largest on record being 65 feet in height with a trunk diameter of 2.5 feet.
The obovate leaves at up to 4 inches in length.
Hardy north to zone 9

Paliurus spina-christi

A moderate growing, large shrub to 14 feet or rarely a tree, that is native from Spain to central Asia. Some records include: 20 years - 23 x 23 feet; largest on record - 33 x 30 feet with a trunk diameter of 1 foot. Excellent for use as a barrier hedge.
Can be used as a hedging plant. Old plants can be cut back to the base and will regrow. This is the plant that was supposedly used to make Jesus's 'Crown of Thorns'.
The deciduous, oval leaves are up to 1.7 x 1 inches, are mid-green, turning to yellow in autumn.
The profuse, yellow green flowers are small and borne in small clusters in spring. They are followed by a flat, round fruits with a membranous wing.
The well armed, arching stems have pairs ( 1 straight and 1 curved ) of sharp spines.
Hardy zones 7 to 10, hardy north to Baltimore.
Prefers fertile, very well drained soil and a warm sunny site. Very drought tolerant.
Pruning in winter is recommended to cut out old wood and prevent overcrowding. Hedging is best pruned in winter while dormant.
Propagation can either be from seed sown during autumn or softwood cuttings taken in summer.

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




* photo taken on October 17 2010 @ U.S. National Arboretum, D.C.

Wollemi Pine

Wollemia

The Wollemia is a genus ( tribe ) of coniferous trees consisting of a single species - Wollemia nobilis. This is one of the oldest trees on earth, it has been around for over 200 million years ( the Triassic Period ). It was presumed extinct for over 2 million years when it was discovered in 1994. This is one of the most exiting and suprising of all discoveries. It looks very much like some of the related Araucarias which are also "Green Dinosaurs".
A large, very rare, majestic coniferous tree native to deep gorges of Wollemi National Park, in the Blue Mountains, 150 miles northwest of Sydney in Australia. It reaches up to 100 feet, though on ideal sites much larger to 133 x 80 feet with a trunk diameter of 4 feet. It is moderate growing ( average 20 inches per year ) with its yearly growth lasting 2 months in the spring, some records include: 3 years - 5 feet; 7 years - 10 feet; 50 years - 66 feet; 100 years - 100 feet.
This tree responds well to fertilizer. Its estimated lifespan is 1000 years.
This tree does not have much genetic variability and no cultivars occur.
The Wollemi Pine can produce stems from the base.
The juvenile foliage is fernlike, waxy and deep green. The adult foliage is also deep green but is narrow, stiff and long.
Both male and female flowers are borne on the same tree, are small and borne at the ends of the branches.
Grows best in rich, moist, acidic ( PH 4 to 6 ), well drained soil in partial shade. It is very heat tolerant and can tolerate as high as 113 F.
Rated as hardy zones 8 to 10 tolerating as low as 10 F; it may actually be much hardier than its restricted natural range suggest, with claims of even zones 5b. More testing of this tree is needed. It is one of the worlds rarest trees, its introduction into the landscape trade is its savior from extinction.
Propagation is from seed, cuttings and tissue culture.
Almost extinct in the wild, there is an international effort to build up numbers of this tree. This tree yields Taxol, an anti-cancer drug. It is very likely to be grown as a commercial crop in the future however is also an excellent, very stunning landscape tree. One of my favorite trees for sure, really looking forward to seeing more in the future.

* photos taken on 4th of July 2010 in Washington, D.C.




* photos taken on May 5 2010 @ U.S. National Arboretum, D.C.


* excellent video found on Youtube



Agathis atropurpurea
A huge tree native to northern Queensland where it is endangered.
The leaves are up to 2 inches in length.
Some records include: largest on record - 200 feet
Hardy zones

Agathis australia
A fast growing, majestic tree native to New Zealand.
Some records include: 20 years - 47 x 23 feet; largest on record - 308 x 120 feet with a trunk diameter of 23 feet ( estimated, such trees no longer exist due to forest destruction ); longest lived - 4000 years ( est. ). It has been planted in Athens, Georgia and trees have exceeded 50 feet in Cork, Island.
Hardy zones 9 to 12 tolerating as low as 12 F

Agathis brownii
Some records include: 32 years - 67 feet; largest on record -
Hardy zones

Agathis dammeri
Some records include: largest on record - 200 feet with a trunk diameter of 6.5 feet.
The leaves are up to 5 x 2 inches.
Hardy zones 10 to 12

Agathis labillarderi
A huge tree native to elevations of 600 to 6000 feet in New Guinea.
Some records include: largest on record - 200 x 40 feet with a trunk diameter of 7 feet
The leaves are up to 4 x 1 inches.
The bark is dark brown.
Hardy zones 9 to 11

Agathis macrophylla
Also called Agathis vitiensis. Some records include: largest on record - 150 x 120 feet with a trunk diameter of 10 feet.
The leaves are up to 7 x 2 inches.
Hardy zones 9 to 12

Agathis microstachys ( Atherton Kauri )
A very large tree native to northern Queensland.
Some records include: 16 years - 36 feet; largest on record - 170 feet with a trunk diameter of 9 feet.
The leaves are up to 3 inches in length.
The bark is brownish-gray.
Hardy zones 9 to 11

Agathis palmerstonii
Some records include: 20 years - 52 feet with a trunk diameter of 10 inches; largest on record - feet with a trunk diameter of feet
Hardy zones 9 to 11

Agathis phillipensis
Some records include: largest on record - 220 feet with a trunk diameter of 10 feet
Hardy zones 11 to 12

Agathis robusta ( Queensland Kauri )
Some records include: 3 years - 17 x 10 feet; 15 years - 75 feet with a trunk diameter of 11 inches; 100 years - 102 feet with a trunk diameter of 3.5 feet; 300 years - 200 feet with a trunk diameter of 10 feet; largest on record - 200 x 60 feet with a trunk diameter of 20 feet.
Trees have already exceeded 100 feet in Los Angeles, California & reached 40 feet in Cornwall, England.
The leaves are up to 6 x 4 inches.
Hardy zones 9 to 12 tolerating as low as 15 F

subsp. 'nesophila'
Almost identical but native to the mountains of New Guinea.

Sunday, July 25, 2010

Sourwood

Oxydendron arboreum

A moderate growing, dense, pyramidal, small to medium sized tree native to woodlands of the eastern U.S. ( Louisiana to southern Ohio and Pennsylvania and south ) that can reach up to 30 feet or more, sometimes much larger. Some records include: fastest recorded growth rate - 4.5 feet; 1st year - 3 feet; 20 years - 40 x 20 feet; largest on record - 120 x 120 feet with a trunk diameter of 3.5 feet; largest in North Carolina - 120 feet in Robbinsville; largest in Virginia - 95 x 70 feet in Amelia Co. The Sourwood can live to as long as 263 years.
An excellent choice for a landscape specimen or underplanted in a open woodland.
The slightly wavy, finely tooth margined, elliptic leaves are pointy tipped and up to 9 x 4 inches. The foliage is bronze green at first turning to glossy deep green in summer and turns to very attractive scarlet red and purple late in autumn.
The fragrant, small, white, urn-shaped flowers, up to 0.3 inches in length, are borne in upright, spreading racemes, up to 12 inches at the branch tips during mid to late summer.
Later in autumn, the flowers are replaced with small, woody brown capsules.
The twigs are reddish and the thick bark is gray-brown, scaly and deeply furrowed.
The woods weights up to 46.5 pounds per square foot.
Hardy zones 3 to 9 the Sourwood blooms best in full sun but grows very well in partial shade. It prefers the same site conditions as Rhododendrons, preferring moist, deep, peaty, well drained acidic soil. Drought tolerant once fully established. They like their roots cool so mulching with shredded oak leaves or pine needles is recommended plus the fact that root competition from turf can stunt growth. The Sourwood does not like transplanting and is likely to grow very slowly until finely becoming established. It is not hardy north of zone 6 for the first few winters so in those climates approapriate winter protection should be given until the plant hardens. Free of pests or disease.
Smaller trees transplant much better. Propagation is from seed in autumn or softwood cuttings taken in summer as well as tissue culture. Seedlings which are normally slow, grow like weeds under florescent light. Root prune seedlings to make transplanting easier later on.

* photos taken on July 2 2010 in Columbia, MD




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




* photo taken on Oct 25 2011 in Columbia, MD

* photo taken on Oct 30 2011 in Columbia, MD

Hardy Hibiscus

Hibiscus


Hibiscus acetosella 'Mahogany Splendor' (Mahogany Splendor Hibiscus) A fast growing perennial ( annual north of zone 8 ), reaching up to 6 x 5.4 feet, with coarsely-toothed, maple-like leaves. The glossy foliage is deep burgundy-red to nearly black in color. It is mainly grown for its foliage since the pink flowers are small and inconspicuous. Hardy zones 8 to 10 in full sun. It tolerates severe heat as well as both drought, flooding and standing water. It is often tip pruned to encourage bushiness.

* photo taken on Sep 5 2012 in Burtonsville, MD


Hibiscus coccineus ( Texas Star )
An upright, bushy, woody-based perennial, reaching up to 12 x 8 ( rarely over 10 ) feet that is native to wetland edges in the southeastern U.S. ( Arkansas to Virginia and south )
The Maple-like, mid-green foliage is sometimes said to resemble Cannabis in habit.
The scarlet-red flowers, up to 6 inches across, are borne early summer to mid autumn.
Hardy zones 7 to 10 ( 6 with deep winter mulch ). Prefers moist to wet soil but can tolerate the occasional extended drought. Cut old stems to near ground level during winter. Propagation is from seed soaked for 24 hours before sowing during spring. New plants should be installed during spring before active growth begins to ensure full establishment before winter begins.

* photo taken on Aug 21 2011 @ Brookside Gardens, Wheaton, MD

* photos taken on July 1 2014 in Washington, DC


'Blaze Star'
Reaches up to 6 feet, with scarlet-red flowers, up to 8 inches across, borne over a period lasting up to 2.5 months beginning mid summer.

'Swamp Angel'
Similar except for the flowers which are pure white!

Hibiscus grandiflorus ( Velvet Mallow )
A woody-stemmed perennial, reaching up to 8 x 6 feet, that is native to brackish marshes in the coastal southeastern U.S. ( Texas to Georgia; south to Florida )
The huge Maple-like leaves are gray-green and velvety. The foliage makes it a great plant for adding a tropical appearance to a temperate climate.
The showy light pink flowers, up to 10 inches across, are borne during late summer into autumn.
Hardy zones 6a to 9 ( a deep winter mulch is recommended in zone 6 ). It is resistant to Japanese Beetle.

Hibiscus makinoi ( Makino's Mallow )
A massive perennial or woody shrub, reaching up to 15 feet, it is best cut to the ground during early spring each year for a more attractive bushy habit.
Makino's Mallow is native to Ryoku & Kyushu Islands in Japan.
The Maple-like leaves are green.
The flowers, up to 5 inches across, are deep pink in bud, opening to very pale pink.
Hardy zones 7b to 10 in full sun on fertile, moist soil.

Hibiscus moscheutos ( Rose Mallow )
A sub shrubby perennial that is native to marshes, salt marshes and swamps in the southeast U.S. ( southeast Nebraska to Michigan to Ontario, New York State to Massachusetts; south to eastern Texas to northern Florida ) with most cultivars being hardy north to zone 5 if in a warm sheltered location. Variable in size but can reach a maximum of 10 x 6 feet on rich, moist soil though 5 x 5 feet is more typical. Excellent as a focal point, some of the smaller varieties can also be used in pots.
The luxuriant green foliage is maplelike and up to 10 inches in length.
The typically white with red center flowers are huge, up to 12 inches in width and are borne from mid summer to the first fall frost. They attract hummingbirds and butterflies. While the plants are sometimes considered deer resistant, I have had problems on one site with them chewing off the flower buds and the growing tips.
Hardy zones 4 to 8 ( mulch during winter in zones 4 and 5 ) in full sun to partial shade on fertile, humus-rich, moist to wet soil ( tolerates up to 6 inches of water ). They are tolerant of temporary drought but it is best not to let them get to the point of wilting as they will drop lower leaves as well as flower buds. It can even be grown in 20 gallon containers with moisture retentive heavier potting soil.
Tolerates lots of heat and humidity, and actually requires hot summers and full sun to bloom well. Due to their requirement of heat for growth, most perennial Hibiscus are late emerging in spring, not until 10 days after the soil temperature reaches 60 F ( mulching during spring may delay growth ).
Planting during spring is best since in cold winter climates, it needs to be fully established to tolerate a cold winter. A thick mulch, up to 3 to 5 inches deep is also recommended during winter, especially the first winter. A thick winter mulch is also recommended north of zone 7. Cut plants back to 3 inches from the ground after the first hard fall freeze. Plants can also be cut back by 1/2 during early summer to encourage a compact bushy habit.
Cultivars are typically propagated by means of tissue culture however tip cuttings can also be used however it is essential to take them early in the season.
Japanese Beetles can severely damage the foliage on some sites. Hibiscus Sawfly is also an occasional problem which will also turn the foliage into lacy skeletins. If you suspect Sawfly is feeding on your plants, look for tiny green worms beneath the leaves. Japanese Beetles and Sawfly Larvae may eat the leaves - treat plants with Bayer Systemic if that occurs. Other problems may include leaf spot or rust though rare.


* photo taken on 4th of July 2010 in Washington, D.C.


* photos taken on July 16 2012 in Columbia, MD


* photos taken on Aug 4 2013 in Bayfield, Ontario


* photo taken by Robert H. Mohlenbrock @ USDA SCS. 1991. Southern wetland flora


'Blue River II'
Reaching up to 8 x 4 feet with massive, clear white dinner plate sized flowers up to 15 inches across in late summer.

* photo taken on July 21 2011 in Columbia, MD

* photo taken on July 11 2014 in Washington, DC


'Bordeaux'
Dense and full, reaching up to 3.5 x 3.5 feet with luxuriant green, ovate foliage.
The abundant, red ( slightly tinged pink ) flowers, up to 10 inches across, appear mid summer through autumn.

* photo taken on Aug 2 2013 @ Stratford, Ontario


'Chabilis'
Reaching up to 5.4 x 8.3 feet and dense in habit. The ovate foliage is luxuriant green. The huge, pure white flowers, up to 10 inches across, appear from mid summer through autumn. Hardy zones 4 to 9

* photos taken on August 12 2011 in Ellicott City, MD







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

* photos taken on July 30 2012 in Ellicott City, MD

br /> * photo taken on Aug 30 2013 in Ellicott City, MD

* photos taken on July 23 2014 in Ellicott City, MD

* photo taken on July 23 2014 in Columbia, MD


'Cranberry Crush'
Very vigorous, compact and dense in habit, reaching up to 4.3 x 5 feet ( 3.3 x 4 feet in 3 years ), bearing intense, scarlet-red flowers, up to 8 inches across, from early summer until autumn frost. A single plant may produce up to 20 stems.
The leathery, Maple-like leaves, up to 5 x 3 inches in size, are glossy, deep green, often purplish tinged.
Very drought tolerant.
Tolerates at least as cold as -30 F. Drought tolerant and resistant to insect damage.

'Cristi'
Reaches up to 6 feet, with huge, stunning shiny deep red flowers.

'Crown Jewels'
Compact in habit, reaching 4 x 4 feet.
The deeply-cut foliage is deep violet-purple.
The flowers, up to 10 inches across, are pure white with an intense deep red eye.
Very resistant to insect pests.
Hardy zones 4+, it tolerates at least as cold as -30 F and as hot as 110 F.

'Disco Belle'
Reaching up to 4 feet

'Fantasia'
A vigorous, compact, shrub-like perennial reaching up to 5 x 3 ( rarely over 3 ) feet in size.
Luxuriant mid-green, lobed, Maple like foliage compliments abundant flowers up to 9 inches across that are rose-pink with a red eye, being borne from mid-summer until autumn frost.
Hardy zones 4 to 8 ( tolerating at least as cold as -30 F ).
Very heat tolerant, to 110 F. Very resistant to insect pests.

'Fireball'
A vigorous, very sturdy, compact shrub-like perennial, reaching up to 6 x 10 ( rarely over 5 x 6 ) feet, with fine-textured, dissected, luxuriant purplish-green foliage.
The leaves are up to 6.5 x 6 inches in size.
The very profuse, huge, intense scarlet-red flowers, up to 12 inches across, are borne mid-summer until autumn frost.
Hardy zones 4 to 9, tolerating at least as cold as -30 F.
Very resistant to insect pests.

* photos taken on July 18 2014 in Columbia, MD

* photo taken on Aug 3 2011 in Columbia, MD




* photos taken on Sep 15 2011 in Columbia, MD



* photo taken on Aug 19 2012 in Harford Co., MD


* photos taken on Aug 18 2013 in Columbia, MD

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


'Galaxy'
Upright and strong growing, to 6 x 4 feet. The huge flowers up to 12 inches across are borne from June into October. The flowers can be either white, pink or red, usually all on the same plant but usually with a red center.

* photos of unknown internet source




'Greenache'
A dense and sturdy, shrub-like perennial reaching up to 5.2 x 8.3 ( rarely over 4 x 5 ) feet with luxuriant green ovate foliage and intense pure pink flowers up to 8 inches across in mid summer.

* photo taken on Aug 3 2011 in Columbia, MD



* photo taken on July 16 2012 in Columbia, MD

* photos taken on June 30 2012 in Columbia, MD

* photo taken on Sep 10 2012 in Columbia, MD


'Jazzberry Jam'
Forms a dense, shrublike perennial to 5 x 7 feet.
The ruffled flowers are up to 9 inches across and are deep magenta-pink with a red eye.
The foliage is clean and deep green.
Hardy north to zone 4.

'Kopper King'
Reaches up to 5 x 6.3 feet with attractive, bronze-purple, deeply cut ( 3 or 5 Maple lobed ) foliage. The leaves are up to 6.5 x 5 inches in size.
The profuse, huge flowers, up to 12 inches across, are white with pink veins and a raspberry red center. Blooms from July until first fall frost.
Very resistant to insect pests.

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






* photo taken on August 2 2010 in Bayfield, Ontario


* photos taken on Sep 4 2011 in Harford Co, MD




* photos taken on July 14 2013 in Harford Co., MD

* photo taken on July 11 2014 in Washington, DC

* photos taken on July 18 2014 in Columbia, MD


'Lady Baltimore'
Reaches up to 6 x 5 feet with attractive, deeply-cut, deep green leaves, up to 7 inches in length. The profuse flowers are large, to 10 inches across, are bright pink with a red center. The flowers are borne from July until first fall frost.

* photo taken on Aug 13 2011 in Ellicott City, MD

* photos taken on Aug 27 2011 in Columbia, MD


* photo taken on July 10 2013 in Columbia, MD

* photo taken on Sep 5 2013 in Columbia, MD

* photos taken on Sep 14 2013 in Columbia, MD

* photo taken on July 24 2014 in Columbia, MD


'Lord Baltimore'
Reaches up to 7 x 7 feet with deep green, deeply cut, attractive foliage. The profuse flowers are large, to 10 inches across, are brilliant scarlet red and ruffled. Blooms from July until first fall frost.

* photos taken on Sep 2 2010 in Clarksville, MD










* photos taken on July 16 2012 in Columbia, MD

* photos taken on July 31 2012 in Columbia, MD

* photos taken on Aug 17 2012 in Columbia, MD

* photo taken on Sep 10 2010 in Columbia, MD

* photos taken on July 25 2013 in Columbia, MD

* photos taken on Aug 25 2013 @ University of Maryland, College Park


'Luna Blush'

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


'Luna Pink Swirl'
Sturdy, compact and vigorous, reaching up to 4.3 x 4.5 ( rarely over 3.5 ) feet, with abundant, pink flowers, up to 8 inches across, borne mid-summer until autumn frosts.
The attractive foliage is deep green.
Excellent for use in containers. Can be grown from seed.
Considered to be root hardy to -20 F, it is known to also survive and thrive in colder climates such as Thunder Bay, Ontario if supplied with reliable snow cover or thick winter mulch.

* photo taken on July 15 2013 in Columbia, MD

* photos taken on July 24 2014 in Columbia, MD


Hibiscus 'Luna Red'

* photo taken on July 10 2013 in Columbia, MD

* photo taken by Milan Havlis ( havlis.cz )

* photo taken on July 24 2014 in Columbia, MD


'Luna Rose'
Sturdy, compact and vigorous, reaching up to 4.3 x 5 ( rarely over 3.5 ) feet, with abundant, deep red flowers, up to 8 inches across, borne mid-summer until autumn frosts.
The attractive foliage is deep green.
Excellent for use in containers. Can be grown from seed.
Considered to be root hardy to -20 F, it is known to also survive and thrive in colder climates such as Thunder Bay, Ontario if supplied with reliable snow cover or thick winter mulch.

* photos taken on Aug 2 2011 in Columbia, MD



* photos taken on July 28 2012 in Columbia, MD

* photo taken on Aug 18 2013 in Columbia, MD

* photos taken on July 24 2014 in Columbia, MD


'Luna White'
Sturdy, compact and vigorous, reaching up to 4.3 x 5.8 ( rarely over 3.5 ) feet, with abundant, pure white ( with red center ) flowers, up to 8 inches across, borne mid summer until autumn frosts.
The attractive foliage is mid-green.
Excellent for use in containers. Can be grown from seed.
Considered to be root hardy to -20 F, it is known to also survive and thrive in colder climates such as Thunder Bay, Ontario if supplied with reliable snow cover or thick winter mulch.

* photos taken on July 28 2012 in Columbia, MD
* photos taken on July 2013 in Columbia, MD

* photos taken on July 24 2014 in Columbia, MD


'Midnight Marvel'
A rapid growing, spectacular, perennial Hibiscus, reaching up to 5 x 6 feet.
This Hibiscus is excellent for a focal point in the perennial border or as a seasonal hedgerow.
The deeply-lobed, Maple-shaped, blackish-purple foliage is even darker 'Kopper King'. The foliage turns to attractive orange shades during autumn.
The very profuse, huge, deep red flowers, up to 10 inches across, are borne over an exceptionally long season lasting up to 12 weeks from mid July until mid autumn.

* photo taken on June 10 2013 in Columbia, MD

* photos taken on July 30 2013 in Columbia, MD

* photos taken on Aug 2 2013 in Stratford, Ontario


'Moon River II'
Reaches up to 5 feet in height, with huge flowers, up to 10 inches across, that are pure white. The flowers are borne mid summer to early autumn.

'Moy Grande'
Bushy in habit, reaching up to 7 x 6.8 feet in size, with huge, abundant, bright rosy-red flowers, up to 16 inches across! The flowers, borne mid summer to early autumn are among the largest of all Hibiscus.
The luxuriant deep green foliage is not deeply-cut.
Hardy zones 5a+

'Old Yella'
Study, upright and bushy in habit, reaching up to 6 x 4 feet ( 4 x 2.5 feet in 2 years ).
The leaves are up to 6.5 x 5 inches in size.
The profuse, huge, thick flowers, up to 12 inches across, are very pale yellow with a red eye. The slightly ruffled flowers are bright yellow in bud.
Tolerates at least as cold as -30 F. Very resistant to insect pests.

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

* photos taken on July 11 2014 in Washington, DC


'Peppermint Flare'
Reaches up to 6 x 4 feet, with huge flowers, up to 10 inches across, that are white to very pale pink with a deep red center from which red specks radiate.

'Pink Elephant'
Reaches up to 6 x 5 feet, with huge, ruffled pink ( with red eye ) flowers, up to a foot across!

'Plum Crazy'
Vigorous and compact, to 4 x 3 feet ( 3.5 x 3 feet in 2 years ).
The purplish leaves, up to 5.5 x 4 inches, are 3-lobed and deeply dissected.
The plum-pink ( with deeper eye ) flowers, up to 10 inches across, are borne mid summer until autumn frosts.
Hardy zones 4 to 9 at least ( tolerating -30 F or colder if mulched deeply during winter ). It can also tolerate as high as 110 F.
Very resistant to Japanese Beetles.

* photo taken on July 10 2013 in Columbia, MD

* photo taken on July 11 2014 in Washington, DC


'Robert Fleming'
Compact in habit, reaching up to 3 x 4 feet.
The crinkled leaves are deep green.
The profuse, huge, velvety, intense very deep red flowers, up to 10 inches across, are borne late June and well into autumn.
Very drought tolerant.

'Royal Gem'
Compact and upright in habit, reaching up to 4 x 3 feet.
The unusual foliage is ovate and deep purple. The leaves are up to 5 x 3.5 inches in size.
The intense pink ( with red eye ) flowers, up to 1 foot across, are borne mid summer to early autumn.
Hardy zones 4+ ( 3 with deep winter mulch )

* photos taken on July 25 2013 in Columbia, MD

* photo taken on July 24 2014 in Columbia, MD


'Southern Belle'
Rapid growing, sturdy and upright, to 6 x 3 ( rarely over 4 ) feet with large, dense foliage. The hugeflowers are borne from July to first fall frost and are up to 10 inches across. They are white, rose pink to deep red.
Moderately deer resistant.

'Summer Storm'
A rapid growing, spectacular, perennial Hibiscus, reaching up to 5 x 6 feet.
This Hibiscus is excellent for a focal point in the perennial border or as a seasonal hedgerow.
The deeply-lobed, Maple-shaped, velvety, blackish-purple foliage is the deepest colored of all Hibiscus including 'Kopper King'. The foliage turns to attractive orange shades during autumn.
The very profuse, huge flowers, up to 10 inches across, are borne over an exceptionally long season lasting up to 12 weeks from mid July until mid autumn. The flowers are light pink with a deep magenta-purple eye and radiating rose-pink veining.

* photo taken on Sep 29 2013 in Ellicott City, MD

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

* photo taken on July 23 2014 in Columbia, MD


'Sweet Caroline'
A fast growing, large perennial up to 6 x 4 feet in size with luxuriant foliage that is bright green at first, later deepening to mid-green. The leaves are up to 7 x 5 inches in size.
The very large, ruffled flowers, up to 12 inches across, are bright pink with darker veins and a rose-red center. The flowers are borne over a very long season beginning mid-summer.
Hardy zone 4 to 9

* photos taken on July 21 2011 in Columbia, MD



* photo taken on July 28 2012 in Columbia, MD

* photo taken on Aug 18 2013 in Columbia, MD


Hibiscus mutabilis ( Confederate Rose )
Native to China, in cold climates this is a massive perennial, reaching up to 12 feet. In tropical climates, it becomes a very fast growing, upright, branched, evergreen tree, reaching a maximum size of 27 x 12 feet.
The large, 5 to 7 lobed, palmate leaves are up to 10 inches in length. The foliage is deep green.
The flowers, up to 7 inches across, have up to 12 petals.
The blooms range in color from white to pink ( less often red ), and are borne mid summer until autumn frost.
They are followed by rounded seed capsules, up to 1 inch across.
Hardy zones 9 to 12 as a tree, 7 to 8 as a perennial.
Fertilize heavily, as it prefers very fertile, moist, fertile soil in full sun. Cultivars are easily rooted from cuttings.

* photo taken on October 17 2010 @ U.S. National Arboretum, D.C.


'Alba'
The smaller, pure white flowers are double.

'Plena'
The double flowers open white, later deepening to deep rosy-red.

'Raspberry Rose'
A massive, vigorous perennial ( evergreen tree in the tropics ), reaching up to 12 x 10 feet.
The foliage is deep green.
The very profuse, huge, intense raspberry-red flowers, up to 10 inches across, are borne early summer to mid autumn.
Hardy zones 7 to 12 ( 6 with deep winter mulch ).

Hibiscus palustris
Native to North America, from Wisconsin to Massachussetts ( endangered in Ontario ), south to Louisiana to Florida; this perennial Hibiscus grows large to 5 feet or rarely even as much as 9 feet.
The middle stem leaves are 3 lobed and the flowers are borne from July to September. They are white, pink or purple and are up to 7 inches in width.
native to marshy areas in the wild, it prefers wet soil.

Hibiscus paramutabilis
A fast growing, very large perennial ( or woody plant in mild climates ), reaching up
to 10 x 6 feet.
The fuzzy, Maple-like leaves, up to 9 inches across, are mid-green.
The flowers, up to 4 inches across, are borne late summer until autumn frost.
Hardy zones 8b to 11 on moist to wet soil.

'Shanghai Pink'
Larger pink flowers, up to 6 inches across.
Hardy zones 7 to 9

'Shanghai Red Eye'
Pure white flowers that are bright red in the center.
Hardy north to zone 7b

Hibiscus 'Red Flyer'
A hybrid between Hibiscus coccineus & H grandiflorus, that originated from Plant Delights Nursery.
It forms a very vigorous, monstrous perennial, reaching up to 12 feet in height.
The foliage is deeply-cut.
The intesne deep pinkish-red flowers are borne mid summer to autumn frost.

Hibiscus sinosyriacus ( Chinese Tree Mallow )
An open, spreading, fast growing large shrub or small tree native to China, that is similar to Hibiscus syriacus ( Rose of Sharon ) except with wider leaves ( to 8 inches across ) and thicker flower petals. The largest on record is 33 x 20 feet.
The Maple-like foliage is glossy deep green.
The large flowers reach up to 8 ( rarely over 4 ) inches across and are borne from August until October.
Prefers hot summer climates or where cool does best against a sunny wall.
Hardy zones 6 to 10 ( less hardy in cool summer climates ) in full sun on fertile soil.
Plant new plants in spring or fall and cut back all shoots to 2 inches of their base to get the plant started growing vigorously. Is best planted small because large plants are much tougher to get established. For better blooming, vigor and larger flowers of mature plants, prune in March and tip back shoots at that time, then deadhead faded blooms in summer. Old overgrown plants can be cut back hard in early spring.
Propagation is from green wood cuttings taken in late spring and also semi ripe cuttings in summer. Generally not grown from seed since while easy, the resulting plants can be very variable. Prefers moderately moist soil with lots of organic matter in sun or partial shade. This plant grows poorly and sparse in full shade.

* photo taken on Aug 4 2013 in Bayfield, Ontario


'Autumn Surprise'
Flowers are white with an intense red center.
'Lilac Queen'
Flowers are white flushed with lilac, centers are red.

Hibiscus syricaus ( Rose of Sharon )
An upright, vigorous, large shrub or small tree ( if trained ) that is native to western Asia and can reach up to 12 feet or more. Some records include: fastest recorded growth rate - 3 feet; 10 years - 17 x 17 feet; largest on record - 33 x 33 feet!
The deep green, 3 narrow, coarsely triangular lobed leaves are up to 4 or rarely 6 inches in length.
The foliage persists late into the fall.
The flowers come in almost every color except for yellow and orange.
The flower petals are up to 3 inches in length.
The branches are smooth and gray.
Prefers hot summer climates or where cool does best against a sunny wall.
Hardy zones 5 to 9 and possibly 4 on a very sheltered site.
Plant new plants in spring or fall and cut back all shoots to 2 inches of their base to get the plant started growing vigorously. Is best planted small because large plants are much tougher to get established. For better blooming, vigor and larger flowers of mature plants, prune in March and tip back shoots at that time, then deadhead faded blooms in summer. Old overgrown plants can be cut back hard in early spring.
Propagation is from green wood cuttings taken in late spring or semi ripe cuttings in summer.
Generally not grown from seed since while easy, the resulting plants can be very variable.
Prefers moderately moist soil with lots of organic matter in sun or partial shade. This plant grows poorly and sparse in full shade. Japanese Beetles and aphids do sometimes attack this plant.

* photos taken on July 13 2010 in Columbia, MD



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




* photos of unknown internet source




'Admiral Dewey'
The double flowers are white.

* photo taken on August 5 2010 in Clinton, Ontario


* photo taken on Aug 1 2013 in Stratford, Ontario


'Aprodite'
Compact in habit, reaching about 12 x 10 feet with leathery, deep green foliage and ruffled, clear pink flowers. This cultivar produced little seed and flowers produsely from mid summer to mid autumn.


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


'Blue Bird'
Vigorous, with large, single flowers, up to 5 inches across, that are gentian blue with a purplish center.

* photos taken on July 1 2011 in Columbia, MD






'Blue Chifton'

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

* photo taken on July 23 2014 in Ellicott City, MD


'Brabant'
Also called Duc de Brabant. Double deep purplish-pink flowers

* photos taken on August 5 2010 in Clinton, Ontario





* photos taken on Aug 4 2013 in Bayfield, Ontario

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


'Coelestis'
Reaches up to 12 feet in height with red centered, lilac blue flowers that are single.

* photos taken on August 2 2010 in Bayfield, Ontario





* photos of unknown internet source





'Diane'
Single, pure, white flowers to 6 inches across from July to November. Produces few seeds.
The foliage is deep green.

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









* photo taken on August 4 2010 @ Stratford, Ontario




* photo taken on August 5 2010 in Clinton, Ontario


* photos taken on July 7 2012 in Columbia, MD


'Hamabo'
The large, single flowers are bluish-white with a crimson center.

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




'Helene'
Compact in habit, reaching about 8 x 7 feet in 10 years with leathery, deep green foliage and ruffled, white ( with red eye spot ) flowers. This cultivar produced little seed and flowers produsely from mid summer to mid autumn.

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

* photos taken on July 11 2014 in Columbia, MD

* photo taken on July 24 2014 in Columbia, MD


'Hino Maru'
Reaches only up to 6 feet with single, pure white flowers to 6 inches across.

'Lady Stanley'
Flowers are white shaded pink, center is crimson.

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


'Lavender Chifton'
Bears large, lavender-pink flowers, up to 3.5 inches across, from mid-summer to mid-autumn. The deeply-lobed foliage is deep green.
* photos taken on Aug 4 2013 in Bayfield, Ontario

* photo taken on July 23 2014 in Columbia, MD

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


'Minerva'
Compact in habit, reaching about 12 x 10 feet with leathery, deep green foliage and lavender ( with dark red eyespot ) flowers. Some records include; 2nd year - 3.3 feet. This cultivar produced little seed and flowers profusely from mid summer to mid autumn.
Cuttings root very easily, sometimes after being just stuck in the ground.
Hardy zones 5 to 8

* photo taken on Aug 4 2013 in Bayfield, Ontario


'Purpureus Variegatus'
Stunning! It reaches a maximum size of 12 x 8 feet with mid-green foliage that is boldly splashed and margined creamy-white and very double purple flowers.
It does not produce seed.

'Red Heart'
The profuse single flowers are white with a red center.

* photos taken on July 1 2011 in Columbia, MD



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


'Rosalinda'
The semi-double flowers are deep purple and centered red.

'White Chifton'
A fast growing, upright shrub, reaching up to 8 feet in height.
The large, single, white flowers are borne mid-summer until autumn frost.

* photo taken on Sep 29 2013 in Ellicott City, MD

* photo taken on July 24 2014 in Columbia, MD


'Woodbridge'
The single flowers are red-pink with a red center.

* photos of unknown internet source

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

* photos taken on Aug 4 2013 in Bayfield, Ontario

* photos taken on July 11 2014 in Washington, DC


'Violet Claire'
Flowers are blue-purple and double.

TROPICAL HIBISCUS

Hibiscus rosa-sinensis ( Chinese Hibiscus )
An evergreen, fast growing, shrub to small tree, reaching up to 10 feet or more ( much less in planters and containers ) that is grown in subtropical to tropical regions around the world. The Chinese Hibiscus is assumed to be native to tropical southern China.
Some records include: largest on record - 40 x 20 feet with a trunk diameter of 1 foot; fastest recorded growth rate - 4 feet.
The toothed, oval leaves, up to 6 x 3.5 inches, are luxuriant glossy deep green.
The single or double flowers, ranging from 4 to 12 inches across, are borne all year in mild climates.
Hardy zones 9 - 12, it may sustain freeze damage above ground in zone 9, it may also be attempted as a perennial on sheltered sites in zone 8. This Hibiscus prefers full sun to partial shade on moist, fertile, well drained soil with a PH below 6. It is moderately salt tolerant but not drought tolerant. Tolerant of temporary flooding.
Prune in very early spring before new growth begins.
Propagation of cultivars is from softwood cuttings taken during late spring.

* photos of unknown internet source








* photos taken on June 10 2013 in Columbia, MD


'The President'
Large, bright-pink ( with deep red-pink center ) flowers.

RELATED COLD HARDY PLANTS

Kitabela vitifolia ( Yugoslav Hibiscus )
A huge, fast growing perennial from the Malva family that is native to Yugoslavia and forms a great clump up to 15 feet across of tall stems up to 10 feet in height originating from a massive rootstock.
The large, deep green, Maple-shaped leaves are 5 or 7 lobed and up to 7 inches across.
The pink-white flowers, borne mid to late summer, are up to 1.5 inches wide.
Hardy north to zone 3 in sun or partial shade on just about any soil.

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



Kosteletzkya virginica ( Seashore Mallow )
A large perennial, reaching up to 8 x 6 ( rarely over 6 x 4 ) feet, that is native to rich moist soil or shallow water in the southeastern U.S. ( from eastern Texas to Long Island, NY; south to southern Florida ).
The palmately-veined, coarsely-toothed, triangular leaves, up to 6 inches in length, are deep green.
The large, single, 5-petalled flowers, up to 3 inches across, are borne over a period lasting up to 6 weeks during late summer to mid autumn ( sometimes blooming as early as June in milder parts of its range ). They are pink to reddish-pink in color.
It thrives in full sun in marshes and salt marshes.

* Robert H. Mohlenbrock @ USDA SCS. 1991. Southern wetland flora

* USDA-NRCS PLANTS Database


'Immaculate'
White flowers, otherwise same as the species.