Coreopsis, Bigflower Coreopsis, Largeflowered Tickseed 'Sunray'

Coreopsisgrandiflora

Family
Asteraceae (ass-ter-AY-see-ee)
Genus
Coreopsis (kor-ee-OP-sis)
Species
grandiflora (gran-dih-FLOR-uh)
Synonym
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Herbaceous
Height
18-24 in. (45-60 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)
Danger
N/A
Bloom Color
Gold (yellow-orange)
Bloom Time
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall
Blooms repeatedly
Other Details
Category
Perennials
Water Requirements
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Grow outdoors year-round in hardiness zone
Can be grown as an annual
Bloom Characteristics
Flowers are good for cutting
This plant is attractive to bees, butterflies and/or birds
Flowers are fragrant
Bloom Size
Other details
Soil pH requirements
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
7.9 to 8.5 (alkaline)
Patent Information
Propagation Methods
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
Regional

This plant is said to grow outdoors in the following regions:

Aurora, Colorado

Monroe, Georgia

Hebron, Kentucky

Pinconning, Michigan

Endicott, New York

Holly Springs, North Carolina

North Augusta, South Carolina

Gillett, Texas

Kalama, Washington

Olympia, Washington

Madison, Wisconsin

Oconomowoc, Wisconsin

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Featured Videos

Gardener's Notes:

3
positives
1
neutral
0
negative
Sort By:
Sort By:
S
Aurora, CO (Zone 5a) | June 2009 | positive

Vigorous and long-blooming, my Sunrays thrive in mild shade or full sun, and seem unbothered by the heat of river rock mulch that I now r...Read More

M
Holly Springs, NC (Zone 7b) | May 2009 | neutral

Easy plant from seed, and fast-growing its first year. Tall when in flower and very showy. However I have had trouble keeping this plant ...Read More

J
Chiloquin, OR | April 2005 | positive

This is a beautiful plant which blooms all summer long in S. central Oregon, zone 5. The only problem is it is susceptible to cucumber b...Read More

S
S
(Zone 8b) | January 2003 | positive

This is a fine blooming plant that flowers all summer special when you deadhead it or cut it a little back it goes on until frost comes. ...Read More

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