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PlantFiles: Bigflower Coreopsis, Largeflowered Tickseed, Tickseed Coreopsis
Coreopsis grandiflora

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Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Coreopsis (kor-ee-OP-sis) (Info)
Species: grandiflora (gran-dih-FLOR-uh) (Info)

2 vendors have this plant for sale.

22 members have or want this plant for trade.

Category:
Perennials

Height:
12-18 in. (30-45 cm)

Spacing:
24-36 in. (60-90 cm)

Hardiness:
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

Danger:
N/A

Bloom Color:
Bright Yellow

Bloom Time:
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall

Foliage:
Unknown - Tell us

Other details:
Requires consistently moist soil; do not let dry out between waterings

Soil pH requirements:
Unknown - Tell us

Patent Information:
Non-patented

Propagation Methods:
From seed; direct sow outdoors in fall
From seed; direct sow after last frost

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds

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There are a total of 19 photos.
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Profile:

11 positives
2 neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive CAndersen On Nov 20, 2014, CAndersen from Apple Valley
United States wrote:

Grown these for years. They give two bloom cycles, after the first you can cut back flowering stems and wait for the next blooming. No dividing necessary. Just discard old plants and keep the seedlings near by. May leave alone to let the birds eat the seeds. Goldfinches and House finches love them!

Positive queentrigger On May 10, 2014, queentrigger from orange park, FL (Zone 9b) wrote:

I bought about a half dozen (I now know is Coreopsis grandiflora) off the .99 cent table at a nursery last year. They were bedraggled & I snipped away lots of black/dead stems, repotted & fertilized them before planting in a bed a few weeks later. They weathered our North Florida winter just fine & have rewarded us with a spectacular flush of blooms this spring. I just deadheaded about 40-60 spent blooms this morning & they're still full of blooms & buds. Very pleased with my gamble to revive those pitiful things last year!

Positive BarbaraParis On Jun 1, 2012, BarbaraParis from Comerio, PR (Zone 11) wrote:

They do perfectly fine here in zone 11. I grew mines from seeds and now they are full of flowers. So beautiful.... and so tough!

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

Bright flowers and self-seeds just freely enough. Blooms May-September in my garden.

Positive ansonfan On Aug 1, 2010, ansonfan from Polkton, NC (Zone 7b) wrote:

This plant is generally listed as a short-lived perennial, but will continue to thrive if the clumps are divided in the spring.

Positive thetripscaptain On Jul 6, 2010, thetripscaptain from Racine, WI (Zone 5a) wrote:

These grow like crazy and produce hundreds of flowers over the course of the summer. They are much stronger plants than the thinner species of Coreopsis such as C. tinctoria. It does have a sort of wild, weedy look to it once it has been blooming for a while. We use sticks and twine to sort of prop them up and that along with constant deadheadding keeps them under control. At the end of each summer I have so many C. grandiflora seeds that I don't quite know what to do with them all.

- JK -

Positive plantango On Oct 7, 2009, plantango from Fox Island, WA wrote:

While growing this plant in Southern California, I noticed a tendency for the leaves to sometimes turn white with a light mold even in summer. I had a small group planted in poor, well-drained soil with full sun next to a hedge. I suspect stress from drying out or possibly from lack of air circulation. Otherwise proved an easy-to-grow plant with incredible profusion of golden flowers.

Positive achoogardner On Jun 16, 2005, achoogardner from Red Oak, NC (Zone 7b) wrote:

This is an easy and beautiful plant. Mine has been blooming none stop after being in the ground for two weeks. It loves full sun and doesn't need much water. My neighbor comments me on it every time she is over!

Positive LilyLover_UT On Jan 16, 2005, LilyLover_UT from Ogden, UT (Zone 5b) wrote:

This is a short-lived perennial, often blooming itself to death. But it's easy to start from seed, and it self-sows nicely.

Neutral bluetopazskye On Jul 2, 2004, bluetopazskye from Covington, KY wrote:

I put in 4 Early Sunrise along a border and was really happy with the spread and floral display. They make a beautiful round high mound of flowers. They do need daily upkeep to deadhead and flies are attracted to them. After two seasons, all four did not come back this year. I found on one site the note that coreopsis tend to live 3-4 seasons, but only after I replaced them with four more. That's disappointing. Any other experiences with short life span?

Positive sweezel On May 1, 2004, sweezel from McKinney, TX (Zone 8a) wrote:

Beautiful when tall and covered in lots of blooms and buds in May. Here in zone 8a/7b (North Texas), they seem to like part sun very well. Mine is getting 4 or 5 hours of morning sun and thrives. I have had it in the ground a year and fertilized it lightly once with fish meal, once with alfalfa meal this spring, but that is all. It is in barely amended black alkaline clay and very happy. The leaves are evergreen with a pretty, flat, maybe 6 inch clump of leaves when not flowering. It stays that way until early spring when the stalks start growing and it gets about 24 inches tall when flowering.

Positive DavidPat5 On Jul 27, 2002, DavidPat5 from Chicago, IL wrote:

DO NOT FERTILIZE Coreopis. They are very easily burned. I used Miracle Grow on mine and many of the new buds are turning brown before they flower. They have been flowering profusely since mid June. They dont seem to be very good cut flowers.

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 1-1 1/2" yellow to orange, single to double flowers on top of 1-2' stems. The foliage is a deep green. They bloom from early to late summer and may bloom in fall if deadheaded.

Regional...

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

Apple Valley, California
San Leandro, California
Bartow, Florida
Orange Park, Florida
Hawkinsville, Georgia
Monroe, Georgia
Stone Mountain, Georgia
Villa Rica, Georgia
Washington, Illinois
Noblesville, Indiana
Westfield, Indiana
Albuquerque, New Mexico
Polkton, North Carolina
Red Oak, North Carolina
Cambridge, Ohio
Oklahoma City, Oklahoma
Mill City, Oregon
Mc Kinney, Texas
Camano Island, Washington
Kalama, Washington
Racine, Wisconsin



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