Photo by Melody

PlantFiles: Bigflower Coreopsis, Largeflowered Tickseed, Tickseed Coreopsis
Coreopsis grandiflora 'Rising Sun'

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

One vendor has this plant for sale.

7 members have or want this plant for trade.


18-24 in. (45-60 cm)

15-18 in. (38-45 cm)

USDA Zone 3a: to -39.9 C (-40 F)
USDA Zone 3b: to -37.2 C (-35 F)
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:
Mid Summer
Late Summer/Early Fall
Mid Fall
Blooms repeatedly


Other details:
Drought-tolerant; suitable for xeriscaping

Soil pH requirements:
Unknown - Tell us

Patent Information:
Unknown - Tell us

Propagation Methods:
Unknown - Tell us

Seed Collecting:
Unknown - Tell us

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By kniphofia
Thumbnail #1 of Coreopsis grandiflora by kniphofia

By efbiosis
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By efbiosis
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2 positives
1 neutral
No negatives

Gardeners' Notes:

Neutral kdfisher On Oct 31, 2010, kdfisher from Ellijay, GA (Zone 7a) wrote:

Taken over by powdery mildew the first year bought through Lowes. Could be they are in a location that is blocked from breezes...poor air circulation. Waiting to see if they return in 2011.

Positive lola23 On Jul 18, 2007, lola23 from Portland, OR wrote:

Coreopsis grows very well in my NW garden, even in clay soil. If you want to see blooms, though, you'll have to stay on top of dead-heading. As an added bonus, it's known to attract lady bugs.

Positive efbiosis On May 19, 2007, efbiosis from Oakland, CA (Zone 10a) wrote:

This is a great plant for the mid border. Covers itself with fully double, bicolor blooms in late spring. Needs periodic shearing of spent blooms to keep the flowers coming; not affected by powdery mildew.

June 2007 edit: Some powdery mildew is blooming on interior leaves. Seems to respond well to systemic treatments. Butterflies love this plant and you'll need to dead head frequently as flowers will close quickly and begin to set seed.


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

Athens, Illinois
Pinconning, Michigan
Saginaw, Michigan
Port Washington, New York
Richfield, Ohio
Oklahoma City, Oklahoma
Bend, Oregon
Portland, Oregon
Knoxville, Tennessee
Petersburg, West Virginia
Milwaukee, Wisconsin

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