Black-eyed Susan, Gloriosa Daisy, Yellow Ox-eye Daisy
Rudbeckia hirta 'Denver Daisy'

Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Rudbeckia (rud-BEK-ee-a) (Info)
Species: hirta (HER-tuh) (Info)
Cultivar: Denver Daisy

Category:

Annuals

Biennials

Perennials

Height:

18-24 in. (45-60 cm)

24-36 in. (60-90 cm)

Spacing:

18-24 in. (45-60 cm)

Hardiness:

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)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

Sun Exposure:

Full Sun

Sun to Partial Shade

Danger:

Unknown - Tell us

Bloom Color:

Gold (Yellow-Orange)

Pale Yellow

Bright Yellow

Brown/Bronze

Bloom Time:

Late Spring/Early Summer

Mid Summer

Late Summer/Early Fall

Foliage:

Herbaceous

Other details:

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

Drought-tolerant; suitable for xeriscaping

Average Water Needs; Water regularly; do not overwater

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

Flowers are good for cutting

Suitable for growing in containers

Soil pH requirements:

Unknown - Tell us

Patent Information:

Non-patented

Propagation Methods:

By dividing the rootball

From herbaceous stem cuttings

Seed Collecting:

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Regional

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

Delta, Colorado

Fort Lauderdale, Florida

Newnan, Georgia

Chicago, Illinois

Norfolk, Nebraska

Mantua, New Jersey

Anthony, New Mexico

Black Mountain, North Carolina

Columbus, Ohio

Bolivar, Tennessee

Lewisville, Texas

Oakwood, Texas

Richmond, Texas

Spring, Texas

Tyler, Texas

show all

Gardeners' Notes:

2
positives
0
neutrals
0
negatives
RatingContent
Positive

On Jul 24, 2015, vossner from Richmond, TX (Zone 9a) wrote:

Planted in 2015 so no invasiveness issues so far. Lovely dark eye, I have it planted in close proximity to r. Indian Summer and r. Goldstrum. Nice display with different yet similar blooms.

Positive

On Jul 2, 2012, patchisback from Mantua, NJ wrote:

This is an incredibly vigorous plant. I have had no problems with it at all. The blooms are very large and brightly colored. I have one plant with large multiple petaled flowers, not doubles, but triple layers of bright yellow petals with red or rust near center. The petals are very narrow and are unlike the wide petals of most Denver Daisy's. I do not know if this is a freak variety or a legitimate new flower form. Has anyone had any experiences like this with this variety?