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Coreopsis, Tickseed 'Jethro Tull'


Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Coreopsis (kor-ee-OP-sis) (Info)
Cultivar: Jethro Tull
Additional cultivar information:(PP18789)
Hybridized by Saul, Itsaul Plants
Registered or introduced: 2008



Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Flowers are good for cutting

This plant is attractive to bees, butterflies and/or birds

Flowers are fragrant

Water Requirements:

Drought-tolerant; suitable for xeriscaping

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Grow outdoors year-round

Suitable for growing in containers


12-18 in. (30-45 cm)


12-15 in. (30-38 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

Sun to Partial Shade



Bloom Color:

Gold (Yellow-Orange)

Bright Yellow

Bloom Time:

Late Spring/Early Summer

Mid Summer

Late Summer/Early Fall




Other details:

Unknown - Tell us

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; sow indoors before last frost

Self-sows freely; deadhead if you do not want volunteer seedlings next season

Seed Collecting:

Collect seedhead/pod when flowers fade; allow to dry

Properly cleaned, seed can be successfully stored


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

Boulder Creek, California

Ventura, California

Colorado Springs, Colorado

Norwalk, Connecticut

Daytona Beach, Florida

Cordele, Georgia

Lawrenceville, Georgia

Atalissa, Iowa

Marrero, Louisiana

Pollock, Louisiana

Baltimore, Maryland

Sandwich, Massachusetts

Commerce Township, Michigan

Dearborn Heights, Michigan

Garden City, Michigan

Florence, Mississippi

Madison, Mississippi

Haddonfield, New Jersey

Albuquerque, New Mexico

Elephant Butte, New Mexico

Charlotte, North Carolina

Creston, North Carolina

Oklahoma City, Oklahoma

Albion, Pennsylvania

Gödöllő, Prince Edward Island

Saint George, South Carolina

Sumter, South Carolina

Knoxville, Tennessee

Houston, Texas

Paris, Texas

Staunton, Virginia

Freeland, Washington

Kalama, Washington

Lake Stevens, Washington

Stanwood, Washington

show all

Gardeners' Notes:


On Jun 29, 2017, GardnerGreg from Norwalk, CT wrote:

Zone 7A and I have three Jethro Tull in my border. I like the flowers and I get a lot of blooms but the plants always flop. They grow about three feet tall and then spill over flattening everything around them. I've squeezed them into rings this year and might try adding gravel to the soil as I have very rich soil (amended with home-made compost). If that doesn't work I'll have to give them up. With the flopping I have to allocate almost 9 square feet of garden space to them and I only get blooms from June to early July.


On Jun 10, 2012, joys_garden from Virginia Beach, VA wrote:

My Jethro Tull has developed a serious case of fungus. All my other perennials are looking good. I have 4 other types of coreopsis in the same bed and all are thriving. Ive treated mine w fungicide and hope it will recover.
I was at Lowes today and I noticed that their Jethro Tull variety is also plagued with the same fungus!
Anyone else have this problem?


On May 4, 2012, melody from Benton, KY (Zone 7a) wrote:

Super reliable in west KY. 'Jethro' forms an attractive mound of golden yellow flowers and blooms from April till fall as long as it is deadheaded.No pests and loves the sun. Great plant!


On Jan 31, 2011, goodwin315 from Saint George, SC (Zone 8a) wrote:

This plant comes back every year for me.Sometimes popping up in places I didn't plant it(reseeding and my yard and neighbors yards).I live in zone 8.I purchased my plants from Santa Rosa Gardens.


On May 30, 2010, ms_greenjeans from Hopkins, MN (Zone 4a) wrote:

This coreopsis has lovely large flowers and a long bloom time. However, in zone 4a, only 2 out of 8 survived one winter.


On Aug 19, 2009, Kathy5 from Rockford, IL wrote:

I had three jethro tulls, last year. They did beautiful, but they did not survive the winter.


On Jun 21, 2008, bahakiwi from Port Orange, FL wrote:

This is one of the hardiest plants in my butterfly garden. We have had 2 straight weeks of rain and this has been one of the very few survivors. It blooms profusely in full sun without any signs of stress. Very low maintenance plant.


On Apr 22, 2008, dmj1218 from west Houston, TX (Zone 9a) wrote:

Pretty robust and flowers well, even down here. Blooms a little later than most of the Coreopsis species.


On Sep 7, 2007, Gabrielle from (Zone 5a) wrote:

This is a patented plant.


On Mar 24, 2007, berrygirl from Braselton, GA (Zone 8a) wrote:

'Jethro' is the result of a natural cross of 'Zamfir' and 'Early Sunrise'. This bright Golden yellow coreopsis grows to 15-18 in. tall. Butterflies love it but deer don't.