Saturday, May 1, 2010

Coreopsis

Native to North America, these are among the toughest, reliable, summer blooming perennials around. The Coreopsis's are distant relatives of the Aster. They attract butterflies and hummingbirds. The Coreopsis are also resistant to drought, intense heat, poor soil, salt, wind, urban conditions and even fire. They are not usually eaten by insects, rabbits or deer. Excessively fertile soil or shade may cause plants to grow lanky and fall over. Most species are very east to grow as long as planted on a sunny well drained site. Deadheading the spent blooms may be a massive chore - just shear the entire plant way back after the first flush of blooms.
Taller varieties may be sheared back by half during late spring to encourage a lower denser habit.
They are easy to propagate by dividing the clumps in mid autumn. Coreopsis are fast to expand and can be divided yearly. Plants installed during autumn should be planted at least 1 month before killing frost. Bare root plants must be installed during early to mid spring before active growth begins.


* photo taken on October 17 2010 in Crownsville, MD

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

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

* photo taken on July 1 2014 in Columbia, MD


Coreopsis alpina
A perennial, reaching up to 8 inches x 1 foot.
The ferny foliage is bright green.
The abundant flowers are borne early summer to early autumn.
Hardy zones 4 to 9 in full sun. Established plants are drought tolerant.

'Alba'
A small Coreopsis with delicate white flowers.

Coreopsis auriculata ( Mouse Ear Tickseed )
A stoloniferous colony forming perennial reaching up to 2 ( rarely 2.5 feet ) x 4 feet that is native to wood openings, limey woods and pine barrens in the southeast U.S. ( from Kentucky to Virginia and south ).
The basal foliage is lance-shaped, up to 5 inches in length, and evergreen. The fuzzy foliage is mid-green.
The golden-yellow flowers, up to 2 inches across, are borne late spring into early summer.
Hardy zones 4 to 9

* photo of unknown source on internet


* photo taken on May 9 2015 in Elkridge, MD


'Autumn Blush'
Reaches up to 26 x 32 inches with 1 inch flowers, borne May though the summer, that are deep yellow on the outside, scarlet on the inside.

'Nana'
A long lived, dense, low growing perennial, up to 15 inches in height, forming a stoloniferous colony up to 2 feet across in a single season, eventually up to 5 feet in width. It is an excellent groundcover for dry sandy areas.
The lance-shaped leaves are up to 5 inches in length.
The orange-yellow flowers are borne from May to August. Deadheading encourages repeat bloom.
Hardy zones 4 to 9 in sun or shade.

* photo taken on 2012 in Columbia, MD


'Superba'
The deep orange flowers, up to 3 inches across, are blotched maroon

'Zampfir'
A large growing hybrid reaching up to 1.5 feet in height.
The glossy deep green foliage is topped by profuse brilliant bright orange flowers over a long season from late spring to mid-summer.

* photo taken on May 15 2011 in Columbia, MD


Coreopsis 'Bengal Tiger'

* photo taken on Sep 26 2013 in Baltimore Co., MD

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


Coreopsis 'Cosmic Evolution'
A perennial, reaching up to 2 x 2 feet in size.
The flowers, up to 3 inches wide, are borne mid-summer into mid-autumn.
Hardy zones 5 to 9 ( reports of 4 with reliable snow cover )in full sun on well drained soil.

* photo taken on Sep 9 2014 in Howard Co., MD

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


Coreopsis 'Cosmic Eye'
A threadleaf Coreopsis, forming a clump of attractive, healthy deep green foliage that remains attractive all season. Dense and compact, reaching up to 2.5 x 2.5 feet, this Coreopsis bears hundreds of 2 inch flowers all summer long until autumn frosts.
The flowers are deep red inside fading to bright yellow at the petal tips, also with a bright yellow cone.
Cut back after first flush of blooms to encourage repeat blooming.
Hardy zones 5 to 9 ( reports of 4 on protected sites ), this 100% perennial is very heat and drought tolerant.

* photos taken on Sep 26 2013 in Baltimore Co., MD

* photo taken by Milan Havlis ( havlis.cz )

* photo taken on Sep 10 2014 in Mt Airy, MD


Coreopsis 'Cranberry Ice'
A perennial, reaching up to 1.8 x 3 feet in size.
The flowers, up to 1 inch across, are borne mid-summer to mid-autumn.
Plants cut back during late July look much more attractive during late summer and autumn.
Hardy zones 7 to 9.

* photo taken on Sep 9 2014 in Columbia, MD


Coreopsis 'Electric Avenue'
With C. verticillata parentage, this clump-forming perennial reaching up to 2 feet in height and bears deep green thread-like foliage.
The abundant bright yellow flowers are borne over a very long season.
Hardy zones 5 to 9.

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


Coreopsis 'Full Moon'
Vigorous in habit, reaching up to 2.6 x 3.8 feet, with very abundant, huge, canary-yellow flowers, up to 3 inches across, from mid summer until autumn frosts.
The lush deep green foliage remains attractive all season long.
Hardy zones 5 to 9 and very heat and humidity tolerant.

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

* photo taken on June 10 2013 in Columbia, MD

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

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

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

* photo taken on July 26 2016 in Columbia, MD

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


Coreopsis gladiata ( Coastal Plain Tickseed )
An upright perennial, reaching up to 3 x 1.5 feet in size, that is native to moist meadows and pine flats in the southeastern U.S. ( from eastern Texas to southeast Virginia; south to central Florida ).
The linear leaves, up to 6 x 1.5 ( rarely over 3 ) inches in size, are deep green.
The bright yellow ( with deep purple disk ) flowers are borne during mid to late autumn.
Hardy zones 7 to 11 in full sun to partial shade on moist, sandy soil.

Coreopsis grandiflora ( Large Flowered Tickseed )
A robust bushy perennial, reaching up to 3 x 3 ( rarely over 2 ) feet, with leafy stems bearing mid-green leaves up to 6 inches.
It is native to upland woods in the eastern U.S. ( from central Kansas to Missouri to Virginia; south to New Mexico to northwest Florida ).
The golden-yellow flowers, up to 2 inches across, are borne from May until August.
Hardy zones 3 to 9 in sun on moist, fertile, well drained soil. Plants often self seed, allow a few plants to produce seed to ensure a continuous and expanding supply of these plants. Clumps can be divided during early autumn or early spring.
Prone to slugs on some sites.

* photos of unknown internet source


* photo taken on July 1 2014 in Columbia, MD

* photo taken on May 20 2016 in Annapolis, MD


'Baby Sun'
Also called Coreopsis lanceolata 'Baby Sun' but is actually a hybrid between the 2 species. Fast growing, reaching up to 20 inches x 2 feet.
It bears very abundant, single flowers, up to 1.7 inches wide, that are intense golden-yellow with deep red petal bases.
The flowers are borne early summer to early autumn.

* photo taken on June 7 2012 in Columbia, MD

'Calypso'
Reaches up to 14 inches in height, with foliage that is variegated creamy-white.

'Corey Yellow'
Reaches up to 2 x 2 feet in size.
The flowers are intense golden-yellow with a deep red ring around the center. They appear early summer until autumn frosts.
Hardy zones 4 to 9.

* photo taken on May 5 2017 in Elkridge, MD


'Domino'
Compact in habit, reaching up to 1.8 x 2.2 feet.
The large, fringed, single flowers, up to 2 inches wide, are bright yellow with deep red petal bases.
The very abundant flowers are borne early summer into autumn. This cultivar usually comes true from seed.

* photo taken on June 14 2012 in Columbia, MD

'Double Sunburst'
Reaches up to 4 feet with double golden-yellow flowers.

'Early Sunrise'
Forms a compact mound up to 2 x 4 feet with deep green foliage topped by bright golden-yellow, semi-double flowers, up to 2 inches across, all summer long. Cut to the base at the end of August - it may repeat bloom during mid-autumn.
Very sturdy and does not need staking.
It often reproduces true from seed.

* photos taken on May 21 2011 in Fulton, MD




* photo taken on June 18 2013 in Columbia, MD

* photo taken on June 21 2014 in Harford Co., MD

* photos taken on Oct 14 2015 in Columbia, MD


'Goldfinch'
A miniature, only reaching up to 10 x 15 inches with small, single, golden-yellow ( centered orange ) flowers, up to 2 inches across, borne early summer though often repeating all summer if deadheaded.

'Heliot'
Compact growing, reaching up to 2 x 2 feet with single flowers, up to 2 inches across, that are bright golden-yellow with a crimson-red ring around the center. The blooms appear all summer long. Great in the landscape and in containers.

'Illico'
A dense, compact perennial, reaching up to 12 x 16 inches.
The foliage is blue-green.
It bears abundant golden-yellow flowers all summer long.

* photos taken on June 1 2013 in Columbia, MD


'Kevin Harbutt'
Reaches up to 3 feet in height, with golden-yellow ( with reddish-brown disc florets ) flowers.

'Mayfield Giant'
Reaches up to 4 x 3.2 feet with large, intense golden-yellow ( with mahogany-red center ) flowers up to 4 inches across. The flowers appear over most of the summer

'New Gold'
Reaches up to 3 feet with double flowers.

'Presto'
A compact, miniature form, reaching only 8 inches x 1.5 feet. It is great for containers.
The very abundant, semi-double, golden-yellow flowers, up to 2.5 inches across, are borne early summer into early autumn.

* photo taken on May 15 2011 in Columbia, MD


'Rising Sun'
Reaches up to 4 x 4 ( rarely over 3 ) feet.
The double, golden-yellow ( with mahohany-red center ) fringed flowers over 2 inches across, are borne late spring to early autumn.
Hardy north to zone 3. Shear during mid-summer to encourage denser habit.

* photo taken on May 15 2011 in Columbia, MD

* photo taken by Milan Havlis ( havlis.cz )


'Sunburst'
Reaches up to 4 x 3.3 feet with golden-yellow, semi-double flowers up to 3 inches across.
The flowers are borne early summer until autumn frost.


'Sunfire'
Compact in habit, reaching up to 2 x 2 feet.
The very abundant flowers, up to 2.5 inches across, are golden-yellow with a deep burgundy-red petal base. The flowers are borne from early summer until autumn frost. They appear earlier than on the species.
Hardy north to zone 3.


* photo taken on June 7 2012 in Columbia, MD

* photo taken on June 14 2012 in Columbia, MD
* photo taken on June 10 2013 in Columbia, MD


'SunKiss'

* photo taken on Oct 7 2017 in Elkridge, MD


'Sunny Day'
Forms a sturdy, upright clump up to 2 x 2 feet in size.
The golden-yellow flowers, up to 2 inches wide, are borne all summer long.
Hardy zones 4 to 9.

* photos taken on June 20 2013 in Columbia, MD


'Sunray'
Compact and bushy, reaching up to 3 x 2.5 feet with abundant, golden-yellow, semi-double flowers, up to 2.5 inches wide, borne over a season up to 12 weeks long over summer.
The pinnate foliage is narrow lobed and bright green.

* photo taken on June 10 2013 in Columbia, MD


'Tetra-Giants'
A spectacular, very large, sturdy form, reaching up to 3 x 4.2 feet in size.
The abundant, golden-yellow flowers, up to 3 inches wide, are borne early summer into early autumn.
Hardy zones 4 to 8.

Coreopsis 'Imperial Sun'
A mounding perennial, reaching up to 13 x 20 inches in size.
The foliage is deep green.
The large, bright golden-yellow flowers are borne over a very long season lasting from early summer to mid-autumn.
Hardy zones 5 to 9 in full sun on well drained soil.

* photo taken on Aug 29 2013 in Clarksville, MD


Coreopsis integrifolia ( Chipola Rover Coreopsis )
A very long-lived, moderate growoing, rhizomatous perennial reaching up to 3 x 4 feet, that is native to open floodplain woodlands in the southeastern U.S. ( from the northwest Florida Panhandle to southwest Georgia to southern South Carolina; south to Jacksonville, FL ). It is endangered in the wild and now limited to just a few counties in each state.
The oppositely-arranged, smooth-edged, ovate leaves are up to 3 inch in length.
The attractive foliage is glossy deep green.
The large, intense deep yellow daisy-like flowers, up to 2.5 inches, are borne from late summer to late autumn.
Hardy zones 4 to 9 in full sun to partial shade, preferring persistently moist but sandy, well drained soil. It survives in flood plains but established plants may tolerate temporary drought. Deer resstant.

Coreopsis 'Jethro Tull'
A fast growing, compact, hybrid ( 'Zampfir' & 'Early Sunrise' ) perennial Coreopsis, reaching up to 1.5 x 2 feet. An excellent choice for containers, mass plantings and borders.
The very showy, double, bright golden-yellow flowers, up to 2.3 inches wide, with fluted petals are borne all summer long. The very abundant flowers are attractive to butterflies. A single plant may bear over 100 blooms at a time.
Hardy zones 4 to 9 in full sun. Responds well to cutting back after first flush of blooms. Drought tolerant and deer resistant.

* photos taken on May 14 2012 in Columbia, MD

* photo taken on June 7 2012 in Columbia, MD * photos taken on June 10 2013 in Columbia, MD


Coreopsis lanceolata ( Lance-leaf Coreopsis )
A fast growing, tough perennial, reaching up to 3 x 4 ( rarely over 2 ) feet, that is native to eastern U.S. ( from northern Wisconsin to Michigan's Upper Peninsula to Manitoulin Island and Killarney to Tobermory, Ontario to northeast Ohio to Maryland; south to central Texas to northern Florida ). It is potentially invasive in Australia.
The elongated, lance-shaped basal leaves, up to 8 ( rarely over 6 ) inches in length, are topped by golden-yellow flowers, up to 3 inches across, borne late spring through late summer if deadheaded.
Hardy zones 3 to 9 in full sun. Heat and drought tolerant. Very easy to grow.

* photo taken on Aug 1 2013 in Stratford, Ontario


'Goldfink'
A bushy dwarf perennial reaching up to 1 foot. The flowers are golden-yellow.

'Sternthaler'
Compact in habit, reaching up to 2.5 x 2 feet with fringed flowers, up to 3 inches wide, that are golden-yellow with deep red rings.
The flowers are borne late spring until mid autumn.

* photo of unknown internet source



'Tequila Sunrise'
Reaches up to 1.5 x 2 feet with foliage that is pinkish-red at first, turning to olive-green with bright cream and yellow variegation. The leaves, up to 6 inches in length, turn to to red in autumn. The daisy-like flowers, up to 2 inches, are bright yellowish-orange and are borne in early summer then randomly repeat blooming into early autumn.

* photos taken on June 10 2013 in Columbia, MD

* photos taken on June 3 2016 in Columbia, MD

* photos taken on Jun 14 2016 in Columbia, MD

* photo taken on Apr 27 2017 in Columbia, MD

* photos taken on June 20 2017 in Columbia, MD


'Walter'
Reaches up to 2 x 2.6 ( rarely over 1.3 x 2 ) feet with golden-yellow flowers, up to 2 inches across that are red centered.

Coreopsis latifolia ( Broadleaf Tickseed )
A large clumping perennial, reaching up to 5 x 3.3 feet, that is native to moist, deciduous woodland in the Smokey Mountains ( from eastern Tennessee to western North Carolina; south to far northeast Georgia to western South Carolina ).
It is endangered in the wild but makes a great landscape plant. The simple, sharply-toothed, broadly-oval leaves, up to 8 x 4 inches in size, are mid to deep green.
The very abundant, bright yellow flowers, up to 1.3 inches wide, are borne mid-summer to mid-autumn.
Hardy zones 5 to 7 ( est ) in partial shade on fertile, moist, well drained soil. It is very disease resistant.

Coreopsis 'Limerock Beauty'
A bushy mound forming perennial reaching up to 2 x 3 feet. It has the fine foliage of Coreopsis verticillata 'Moonbeam' with showy daisy-like flowers that are intense red with yellow centers, borne early summer into early autumn. Cut back after the first flush of bloom encouraging density and reblooming.
It is only hardy as a perennial in zones 8 and 9, annual in colder regions.

Coreopsis 'Limerock Dream'
A fast growing perennial, reaching up to 1.3 x 3 feet in size.
The bright green thread-like foliage resembles that of Coreopsis verticillata.
The tangerine-orange flowers, up to 1.5 inches wide, appear during mid-summer into early autumn.
Hardy zones 8 to 10 in full sun on just about any moderately moist, well drained soil. It is very heat and humidity tolerant. Treat as annual in cooler climates. Shear back by half during mid-summer to encourage repeat bloom.

* photos taken on Sep 16 2013 in Columbia, MD


Coreopsis 'Limerock Passion'
A bushy mound forming perennial reaching up to 2 x 3 feet. It has the fine, deep green foliage of Coreopsis verticillata 'Moonbeam' with showy daisy-like flowers that are lavender-pink with yellow centers, borne early summer into early autumn. Cut back after the first flush of bloom encouraging density and reblooming.
It is only hardy as a perennial in zones 8 and 9, annual in colder regions. Full sun.

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

* photo taken by Milan Havlis ( havlis.cz )



Coreopsis 'Limerock Ruby'
A bushy mound forming perennial reaching up to 2 x 3 feet. It has the fine foliage of Coreopsis verticillata 'Moonbeam' with showy daisy-like flowers, up to 1.7 inches wide, that are intense deep red with yellow centers, borne early summer into early autumn. Cut back after the first flush of bloom encouraging density and reblooming.
It is only hardy as a perennial in zones 8 and 9, annual in colder regions. It requires full sun and is heat tolerant.

* photo taken on June 18 2013 in Columbia, MD


Coreopsis major ( Whorled Leaf Coreopsis )
Also called Greater Tickseed. A strong stemmed, upright perennial, reaching up to 4 feet in height, and spreading up to 5 feet in 3 years, eventually more. It is native to open woodlands in the eastern U.S. ( from western Kentucky to southern Indiana to southern Ohio to Long Island, New York; south to Louisiana to far northern Florida ). It is endangered in Illinois, Ohio, Pennsylvania, New Jersey and New York.
The attractive, leaves are whorled around the stems. The leaves are divided deeply into 3 lance-shaped leaflets up to 3 inches in length. The foliage is luxuriant mid-green.
The golden-yellow flowers, up to 3 ( rarely over 2.5 ) inches across, are borne over a long season from early to mid summer.
Hardy zones 5 to 9 in full sun to partial shade on moist, well drained soil. It is heat tolerant and resistant to mildew, retaining healthy foliage all summer long.

'Coreopsis 'Mercury Rising'
Part of the Big Bang Coreopsis series, forming a tough, long-lived perennial, reaching up to 2 x 3 feet.
The deep red ( centered orange ) flowers, up to 2.2 inches wide, are borne early summer to mid-autumn. It does not produce seed and the bloom season lasts up to 5 months.
Hardy zones 5 to 8 in full sun. It is very mildew resistant. It is also drought and deer resistant.

* photos taken on June 20 2013 in Columbia, MD

* photo taken on May 3 2014 in Baltimore Co., MD

* photo taken on June 26 2014 in Columbia, MD

* photos taken on July 8 2014 in Columbia, MD

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

* photos taken on Oct 24 2014 in Columbia, MD

* photo taken on June 21 2015 in Columbia, MD


Coreopsis palmata ( Stiff Coreopsis )
A rhizomatous perennial, forming dense patches, reaching a maximum height of 3 x 3.8 feet, that is native to the central U.S. Before 1900, it was a common component in the prairie ecosystem.
The single, golden-yellow to orange flowers, up to 1.5 inches wide, are borne late spring into early summer, then sporadically the remainder of summer.
Hardy zones 3 to 8 in full sun on poor, sandy soil. Very drought tolerant and will even grow on pure sand. It is unfortunately very prone to mildew in the humid east.

Coreopsis palustris ( Swamp Tickseed )
A perennial, reaching up to 2.5 feet in height, that is native to swampy coastal-plain forests in the southeastern U.S. ( from far southeast North Carolina to far northeastern Florida ). It is critically endangered in the wild, extinct from South Carolina and has also extinct in Florida since 1898 ).
The entire, lance-shaped leaves are glossy deep green.
The abundant, intense deep yellow flowers are borne early to late autumn.
Hardy zones 6 to 9 in full sun on moist to wet, sandy soil.

Coreopsis 'Pink Sapphire'
A sturdy, upright, mounding perennial, reaching a maximum size of 2.2 x 3.3 feet, that is great for borders and containers.
The fine-textured foliage is deep green.
The large, intense mid-pink ( with white eye ) flowers are borne over a very long 5 + month period from early summer to late autumn.
Hardy Zones 6 to 9 in full sun on well drained soil. It is very drought tolerant but also prone to mildew in the humid east. It can be pruned back after the first flush of blooming to encourage better repeat bloom, however if does not produce seed lessening the need for deadheading. Cut back late in autumn but leave basal growth to protect the plant over winter.

* photos taken on Aug 29 2013 in Clarksville, MD


Coreopsis 'Polaris'
A part of the Big Bang Series; it forms a sturdy, compact perennial, reaching up to 2 x 2 feet.
The fine-textured, thread-like foliage is deep green.
The large, pure white ( with yellow center ) flowers appear early summer until autumn frosts.
Hardy zones 4 to 8 in full sun on well drained soil.

Coreopsis pubescens ( Star Tickseed )
A perennial, reaching up to 3 x 3.3 feet in size, is native to the southern U.S. ( from southeast Kansas to southern Illinois to central Virginia; south to northwest Florida to central Georgia ). It is found in open pink-oak woodland in the wild.
The oblanceolate leaves are up to 3.2 x 1.5 inches in size.
The very showy, bright yellow flowers, up to 1 inch wide, are borne early summer to early autumn if deadheaded.
Hardy zones 5 to 9 in full sun to partial shade on sandy or gravelly, very well drained soil.

'Sunshine Superman'
A mounding perennial reaching up to 2 x 3.3 feet with fuzzy, mid-green, lance-shaped leaves that are topped by abundant, golden-yellow flowers, up to 2 inches wide, during late spring into early autumn.

* photo taken on Oct 17 2016 in Annapolis, MD


Coreopsis 'Red Satin'
A sturdy, upright, clumping perennial, reaching up to 1.8 x 2 feet.
The threadleaf foliage is luxuriant deep green.
The deep red ( with orange center ) flowers, up to 1.5 inches across, that do not fade even in hot sun, are borne all summer, then repeating during autumn until frost occurs. Except for the flowers, it looks nearly identical to Corepsis verticillata 'Zagrab' and looks great planted with it.
Hardy zones 5 to 9 in full sun on well drained soil. Cut back after first flush of blooms for repeat blooming.

* photo taken on Aug 29 2013 in Clarksville, MD


* photos taken on Sep 26 2013 in Baltimore Co., MD

* photos taken on June 21 2014 in Harford Co., MD

* photos taken on July 1 2014 in Columbia, MD

* photos taken on July 8 2014 in Columbia, MD

* photos taken on July 13 2014 in Columbia, MD

* photos taken on Aug 1 2014 in Columbia, MD

* photos taken on Jul 9 2017 in Columbia, MD


Coreopsis 'Red Shift'
A mounding perennial, reaching up to 3.3 x 4.6 feet. It is part of the Coreopsis Big Bang series and has some Coreopsis verticillata in its blood which contributes to its sturdiness.
The linear to narrow lance-shaped leaves are luxuriant mid-green.
The flowers, up to 2 inches across, are creamy-white deepening to deep red in the center. In cooler weather the entire flower may be deep red.
The flowers are borne from early to late summer, often persisting until autumn frost if deadheaded.
Hardy zones 4 to 8 ( even thriving in much of Minnesota ) in full sun. Does not like winter wetness but is otherwise very easy to grow and disease resistant.

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

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

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


Coreopsis rosea ( Pink Tickseed )
Native to North America from southern Nova Scotia to Maryland, it forms a very fast rhizome spreading herbaceous mound up to 3 x 4 feet. Pink Tickseed also has a separate natural range including various parts of South Carolina as well as far northern Georgia. It is critically endangered in the wild in Canada and is most likely extinct from Maine if it has ever occurred there at all. It has disappeared in the wild from most of the New York City Metro area, Long Island as well as much of the Delmarva Peninsula in Maryland and Delaware. It is found on gravelly shorelines in the wild, in Nova Scotia it is usually found bordering on small lakes.
The thread-like leaves, up to 2 x 0.1 inches, are bright green.
The pink flowers, up to 1 inch across, are borne all summer long.
It makes an excellent groundcover for dry slopes.
Hardy zones 3 to 8 in full sun or partial shade on rich, well drained soil. Tolerant of wet soil.

* photos taken on June 20 2013 in Columbia, MD


'American Dream'
Forms vigorous, spreading low mounds up to 2 ( rarely 3 ) x 4 + feet of fine textured rich green foliage.
The abundant, bright rose-pink flowers are borne from early summer until autumn frosts.
Drought tolerant.
Hardy zones 3 to 9 on moist soil. Flood tolerant unlike most Coreopsis.

* photo taken on June 28 2012 in Columbia, MD

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

* photos taken on Sep 23 2013 in Burtonsville, MD

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

* photo taken by Milan Havlis ( havlis.cz )


'Heavens Gate'
Vigorous growing, up to 1.5 x 2.6 feet with flowers, up to 1.7 inches wide, that are pink with deep red centers, borne June into November.

* photo taken by Milan Havlis ( havlis.cz )


'Sweet Dreams'
A very attractive but invasively rhizomatous dense groundcover, it can spread as much as 2 feet in a single year, eventually reaching up to 32 inches x 3.3 feet.
The finely cut foliage is very attractive.
The flowers up to 1.5 inches across, borne from June to September, are deep pink in the center blending to white towards the edges.
Hardy zones 4 to 8. Tolerates as low as -40 F. Drought tolerant.

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


'Coreopsis 'Ruby Frost'
A tough, long-lived perennial, reaching up to 2 x 3.3 feet.
The deep red ( edged in pure white ) flowers, up to 2 inches wide, are borne early summer to mid-autumn. It does not produce seed and the bloom season lasts up to 5 months.
Hardy zones 6 to 8 in full sun. It is very mildew resistant. It is also drought and deer resistant.

Coreopsis 'Solanna Golden Ball'
A compact perennial, reaching up to 15 inches x 1.5 feet.
The very double, large, ball-shaped, bright golden-yellow flowers are borne early summer to early autumn.

* photos taken on June 7 2012 in Columbia, MD

Coreopsis 'Star Cluster'
A moderate growing, 100% perennial, forming a spreading but compact clump up to 2.5 x 4 feet, bearing hundreds of sterile blooms, up to 2.5 inches across, from early summer to mid-autumn. The flowers are white, except for purple at the petal bases and gold button centers.
The attractive foliage is bright green, later deepening to deep green.
Hardy zones 4 to 9, tolerant of heat and drought.
A periodic light shear will keep it looking attractive all season.

* photo taken on July 7 2016 in Elkridge, MD


Coreopsis tripteris ( Giant Coreopsis )
A stoloniferous, highly branched, huge, long-lived perennial, up to 10 x 8 ( rarely over 7 ) feet, forming large colonies, is native to the moist open woods from ( from eastern Kansas to central Iowa to southern Wisconsin to Sarnia, Ontario to New York State; south to Louisiana to Florida. In the Windsor/Essex County, Ontario region; it occurred at the Ojibway Prairie in Windsor, the Detroit River islands and the Lake Erie islands during the 1800s. It was abundant on the Ohio shore and at Detroit, Michigan during presettlement era.
The grayish leaves are up to 8 inches in length.
The flowers, up to 3 ( rarely over 2 ) inches across, borne in sprays are bright yellow turning to purple, during late summer through autumn. The flowers attract butterflies and the seeds attract birds.
Hardy zones 3 to 9 in full sun to partial shade on well drained soil.
Easy to grow from seed. It can also be divided late fall or early spring.

* photo of unknown internet source

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


Coreopsis verticillata ( Whorled Tickseed )
A rapid growing, tough, hardy, rhizomatous, dense, dome-shaped clumping perennial reaching up to 3.5 x 4 feet. It is native to open woods in eastern North America ( from Arkansas to Maryland; south to Florida ). It is endangered in the wild in West Virginia and Maryland.
The very attractive finely divided, narrow leaves, up to 2.5 inches in length, are deep green.
The starry yellow flowers, up to 2 inches across, are borne over a very long season from early summer into early autumn if cut back after the first flush of blooms.
Hardy zones 3 to 9 in full sun on fertile, well drained soil. Very drought tolerant.
Propagation is from division while dormant during autumn or early spring or tip cuttings taken before blooming begins.

* photo taken on July 1 2014 in Columbia, MD


'Creme Brulee'
Forms herbaceous bushes up to 2 x 4 + feet with attractive mildew resistant bright green foliage topped by bright yellow flowers, up to 1.5 inches wide, borne from May to first fall frost.
It is excellent for use in erosion control.

* photo of unknown internet source


* photos taken on Aug 1 2011 in Columbia, MD



* photo taken on Sep 15 2013 in Howard Co, MD


'Creme Caramel'
A fast growing, dense, mounding perennial, reaching up to 1.5 x 2.5 feet.
The foliage is bright green.
The orange flowers, up to 2 inches across, are borne early summer into early autumn.
Hardy zones 5 to 9.

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


'Golden Gain'
Compact habit, reaching up to 2 x 3 + feet with abundant, golden-yellow flowers, up to 2 inches wide, lasting over a long season ( early summer to early autumn ).

* photos taken on June 16 2015 in Columbia, MD

* photos taken on June 20 2016 in Columbia, MD


'Golden Shower'
Fast growing, reaching up to 3 x 3 feet in size with fine foliage.
Bears large, golden-yellow flowers, up to 2.5 inches across, all summer long.

* photo taken on Aug 26 2016 in Columbia, MD

* photos taken on June 13 2017 in Columbia, MD


'Grandiflora'
Similar with larger flowers, up to 1.6 inches.

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


'Main Street'
Forms vigorous herbaceous bushes up to 2 x 4 + feet with intense deep red flowers borne from May to first fall frost.
The threadleaf foliage is deep green.
Hardy zones 4 to 9.

'Moonbeam'
Forms herbaceous bushes up to 2 x 4 + feet with light lemon-yellow flowers, up to 1.7 inches wide, borne from May to first fall frost. The flowers combine well with some of the blue Platycodons.
It is excellent for use in erosion control.
Hardy north to zone 3.

* photo taken on June 25 2015 in Columbia, MD

* photos taken on July 9 2015 in Columbia, MD

* photo taken on July 12 2016 in Columbia, MD


'Route 66'
This cultivar, originating as a seedling of C. verticillata 'Moonbeam', is fast growing, reaching up to 28 x 40 inches with an upright habit. The extremely profuse, very attractive flowers, up to 2 inches across, are yellow with a deep red ring around the center that bleeds out towards the tips of the petals. The flowers are more red than yellow and are borne over a very long season lasting from early summer until the first hard autumn frost. During autumn the flowers often become all red.
The threadleaf foliage is deep green.

* photos taken on Sep 26 2013 in Baltimore Co., MD

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

* photos taken on Aug 19 2016 in Howard Co., MD

* photos taken on Aug 26 2016 in Howard Co., MD


'Sienna Sunset'
Reaches up to 20 inches x 3 feet, bearing deep sienna-orange flowers, up to 1.5 inches wide, from early summer until autumn frost.
Hardy zones 5 to 8.

* photo taken on Sep 26 2013 in Baltimore Co., MD

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

* photos taken on Oct 14 2015 in Columbia, MD


'Sunset Strip'
Reaches up to 2 feet in height, bearing abundant golden-yellow flowers, up to 2 inches across, with bright orange-red streaks radiating from the center.
Hardy zones 5 to 8.

'Zagreb'
Forms compact herbaceous bushes up to 2.5 x 4 + feet with handsome foliage topped by bright yellow flowers borne from May to first fall frost.
It is excellent for use in erosion control and its invasive rhizomes may overgrow their welcome in some gardens, however it is easily divided and my experience is this beauty is always easy to give away.
Hardy north to zone 3

* photo taken on April 17 2010 in Laurel, MD

* photos taken on June 19 2010 in Columbia, MD

* photo taken on August 24 2010 in Columbia, MD

* photos taken on June 17 2011 in Columbia, MD


* photo of unknown internet source
* photos taken on June 14 2012 in Columbia, MD
* photos taken on June 21 2014 in Harford Co., MD

* photo take non June 24 2014 in Columbia, MD

* photos taken on June 20 2015 in Columbia, MD

* photo taken on June 2015 in Harford Co., MD

* photos taken on June 24 2015 in Columbia, MD

* photo taken on July 25 2016 in Howard Co, MD

* photos taken on June 20 2017 in Columbia, MD

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