Bigflower Coreopsis, Largeflowered Tickseed, Tickseed Coreopsis
Coreopsis grandiflora 'Sunray'

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

Category:

Perennials

Height:

18-24 in. (45-60 cm)

Spacing:

15-18 in. (38-45 cm)

Hardiness:

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

Danger:

N/A

Bloom Color:

Gold (Yellow-Orange)

Bloom Time:

Mid Summer

Late Summer/Early Fall

Mid Fall

Blooms repeatedly

Foliage:

Herbaceous

Other details:

Drought-tolerant; suitable for xeriscaping

Soil pH requirements:

Unknown - Tell us

Patent Information:

Unknown - Tell us

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:

Unknown - Tell us

Regional

This plant has been said to grow 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

show all

Gardeners' Notes:

3
positives
1
neutral
0
negatives
RatingContent
Positive

On Jun 28, 2009, s_jones from Aurora, CO (Zone 5a) wrote:

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 regret ever having installed. Continuous, repeat flowers provide months of entertainment for seed collectors.

However, the plants seem prone to diseases and pest problems; they withstand the assaults quite well, but their foliage do not escape unscathed. Consider this a tepid positive rating, unless you are good at identifying and heading off such problems in advance.

Neutral

On May 20, 2009, mcrousse from Holly Springs, NC (Zone 7b) wrote:

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 alive all summer, even with great dirt and good watering. About half of them do well and others don't. Could be that it doesn't like our humidity that well. Maybe someone else from the southeast can report.

Positive

On Apr 22, 2005, Jelaine from Chiloquin, OR wrote:

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 beetles. Two years in a row my three plants have been devoured and almost destroyed.

Positive

On Jan 6, 2003, saya from Heerlen
Netherlands (Zone 8b) wrote:

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. Very reliable !