Photo by Melody

PlantFiles: Threadleaf Coreopsis, Tickseed
Coreopsis verticillata

Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Coreopsis (kor-ee-OP-sis) (Info)
Species: verticillata (ver-ti-si-LAH-tuh) (Info)

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5 members have or want this plant for trade.

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18-24 in. (45-60 cm)

18-24 in. (45-60 cm)

USDA Zone 4a: to -34.4 C (-30 F)
USDA Zone 4b: to -31.6 C (-25 F)
USDA Zone 5a: to -28.8 C (-20 F)
USDA Zone 5b: to -26.1 C (-15 F)
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:
Full Sun


Bloom Color:
Bright Yellow

Bloom Time:
Late Spring/Early Summer
Mid Summer


Other details:
May be a noxious weed or invasive
This plant is attractive to bees, butterflies and/or birds
Drought-tolerant; suitable for xeriscaping
Self-sows freely; deadhead if you do not want volunteer seedlings next season

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:

Propagation Methods:
By dividing the rootball
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; sow indoors before last frost
From seed; direct sow after last frost

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds
Properly cleaned, seed can be successfully stored

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to view:

By frostweed
Thumbnail #1 of Coreopsis verticillata by frostweed

By rebecca30
Thumbnail #2 of Coreopsis verticillata by rebecca30

By Gabrielle
Thumbnail #3 of Coreopsis verticillata by Gabrielle

By kgd7966
Thumbnail #4 of Coreopsis verticillata by kgd7966

By Gabrielle
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By Gabrielle
Thumbnail #6 of Coreopsis verticillata by Gabrielle


3 positives
4 neutrals
No negatives

Gardeners' Notes:

Neutral Gabrielle On Feb 27, 2012, Gabrielle from (Zone 5a) wrote:

Can spread fairly quickly and somewhat prone to powdery mildew. Blooms June - September in my garden. Crop back for fresh growth when shabby looking.

Positive LaFleurBonne On Sep 2, 2008, LaFleurBonne from Satellite Beach, FL wrote:

So far I only have this one volunteer plant which I hope will reproduce. It has bloomed continuously from early Spring and is still going strong though we are now into September. It produces loads of flowers despite poor sandy soil, extreme heat and dry periods, and it also has survived the torrential rains of Fay. This free-flowering no-work airy plant with almost no leaves looks great in the border.

Positive rebecca30 On Jun 7, 2008, rebecca30 from Cary, NC (Zone 7b) wrote:

I have mine planted next to Verbena 'Purple Homestead', nice color combo. Mine are planted under the partial shade of a mimosa tree. Does well still.

Neutral berrygirl On Mar 21, 2007, berrygirl from Braselton, GA (Zone 7b) wrote:

Medium 24" - Plant 14" apart. Golden yellow with green wispy foliage. Continuously in bloom from early summer right into fall. Makes a good cut flower and has narrow tapered foliage. They spread readily and can be used in a naturalized planting, on a sunny bank, or in the traditional border. While they attract butterflies, they are deer resistant.

Positive Lady_fern On Oct 15, 2006, Lady_fern from Jeffersonville, IN (Zone 6a) wrote:

Easy from seed and long-blooming. I strongly prefer these over black-eyed susans.

Neutral Terry On Apr 27, 2001, Terry from Murfreesboro, TN (Zone 7a) wrote:

Tough, drought-tolerant plant. Can become invasive if not deadheaded.

Neutral gardener_mick On Nov 8, 2000, gardener_mick from Wentworth, SD (Zone 4a) wrote:

These are a perennial in zones 4-9. They need full sun and well drained soil that is fertile and somewhat moist. They produce yellow flowers on top of 1 1/2-2' stems. The foliage is a deep green. They bloom late spring to late summer.

These are a great addition to cut flower arrangements.


This plant has been said to grow in the following regions:

Keystone Heights, Florida
Satellite Beach, Florida
Cordele, Georgia
Boise, Idaho
Washington, Illinois
Jeffersonville, Indiana
Florence, Mississippi
Kansas City, Missouri
Fuquay Varina, North Carolina
Winston Salem, North Carolina
Belfield, North Dakota
Tulsa, Oklahoma
Sioux Falls, South Dakota
Abilene, Texas
Arlington, Texas
Fort Worth, Texas
Milwaukee, Wisconsin

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