Rudbeckia, Black-Eyed Susan, Gloriosa Daisy 'Irish Eyes'

Rudbeckia hirta

Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Rudbeckia (rud-BEK-ee-a) (Info)
Species: hirta (HER-tuh) (Info)
Cultivar: Irish Eyes
Additional cultivar information:(aka Green Eyes)
View this plant in a garden





Water Requirements:

Drought-tolerant; suitable for xeriscaping

Average Water Needs; Water regularly; do not overwater

Sun Exposure:

Full Sun

Sun to Partial Shade



Foliage Color:

Unknown - Tell us


24-36 in. (60-90 cm)


12-15 in. (30-38 cm)

15-18 in. (38-45 cm)


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)

Where to Grow:

Grow outdoors year-round in hardiness zone

Can be grown as an annual



Bloom Color:

Gold (yellow-orange)

Bright Yellow

Bloom Characteristics:

Flowers are good for cutting

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

Flowers are fragrant

Bloom Size:

Unknown - Tell us

Bloom Time:

Late Spring/Early Summer

Mid Summer

Late Summer/Early Fall

Mid Fall

Blooms repeatedly

Other details:

Unknown - Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:

Unknown - Tell us

Propagation Methods:

From seed; sow indoors before last frost

Seed Collecting:

Collect seedhead/pod when flowers fade; allow to dry


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

Auburn, Alabama

Vincent, Alabama

Boulder Creek, California(2 reports)

Calistoga, California

Clayton, California

Fairfield, California

Glen Avon, California

Knights Landing, California

Paradise, California

Pedley, California

Petaluma, California

Rubidoux, California

San Leandro, California

Sunnyslope, California

Winter Springs, Florida

Augusta, Georgia

Woodstock, Georgia

Carol Stream, Illinois

Machesney Park, Illinois

Louisville, Kentucky

Haydenville, Massachusetts

Quincy, Massachusetts

Dearborn Heights, Michigan

Manchester, New Hampshire

Ithaca, New York

Fuquay Varina, North Carolina

Canton, Ohio

Cincinnati, Ohio(2 reports)

Geneva, Ohio

Salem, Oregon

White City, Oregon

Mercer, Pennsylvania

Osceola Mills, Pennsylvania

Columbia, South Carolina

North Augusta, South Carolina

Lebanon, Tennessee

Desoto, Texas

Webster, Texas

Ogden, Utah

Smithfield, Virginia

Kalama, Washington

show all

Gardeners' Notes:


On Jan 26, 2011, sunkissed from Winter Springs, FL (Zone 9b) wrote:

I've only had luck with these as an annual in Central FL. They also had to be in filtered sunlight. But I sure enjoy their beauty mixed in my flower pots.


On Mar 11, 2010, Rupeee from Riverside, CA (Zone 9b) wrote:

LOVE THIS PLANT. Blooms year around for me with deadheading. Flowers are large on tall stems. Multiplies nicely. Little care. Loves our dry hot summers.


On Oct 15, 2007, kqcrna from Cincinnati, OH (Zone 6a) wrote:

This plant wintersowed very well for me. Blossoms have been as large as 5 inches in diameter. I think the green eye makes it particularly pretty and unique in the sunny garden.


On Sep 3, 2005, flowercrazy39 from Manchester, NH wrote:

So far I like this plant a lot. Hasn't rained hardly at all here in southern New Hampshire so some of my flowers have had a hard time to bloom. But it's growing and I've seen at least two blooms so far and they last a really long time.


On Oct 14, 2004, lmelling from Ithaca, NY (Zone 5b) wrote:

I purchased seeds for this plant in 2001, where they listed it as an annual, but the Irish eyes have been coming back each year to delight me. They reseed prodigiously and I find that I end up pulling up or moving many seedlings during the summer, which have strayed into the other plants surrounding them. I suggest that you give these plants plenty of room or plant them as part of a cottage style garden. They will probably need staking midway through the summer as they can grow up to 4' tall!

Halfway through the summer I needed to move a group of these to another location and they took off in their new home without even wilting - of course it's been a cool (70's) and rainy summer here in NY. It is now October14th and a few of the group that I moved are still blooming d... read more