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

Rudbeckiahirta

Family
Asteraceae (ass-ter-AY-see-ee)
Genus
Rudbeckia (rud-BEK-ee-a)
Species
hirta (HER-tuh)
Synonym
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Herbaceous
Height
24-36 in. (60-90 cm)
Spacing
12-15 in. (30-38 cm)
15-18 in. (38-45 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)
Danger
N/A
Bloom Color
Gold (yellow-orange)
Bright Yellow
Bloom Time
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall
Mid Fall
Blooms repeatedly
Other Details
Category
Annuals
Biennials
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
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information
Propagation Methods
From seed; sow indoors before last frost
Seed Collecting
Collect seedhead/pod when flowers fade; allow to dry
Regional

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

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

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Featured Videos

Gardener's Notes:

4
positives
1
neutral
0
negative
Sort By:
Sort By:
S
Winter Springs, FL (Zone 9b) | January 2011 | neutral

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 i...Read More

R
R
Riverside, CA (Zone 9b) | March 2010 | positive

LOVE THIS PLANT. Blooms year around for me with deadheading. Flowers are large on tall stems. Multiplies nicely. Little care. Loves ...Read More

K
K
Cincinnati, OH (Zone 6a) | October 2007 | positive

This plant wintersowed very well for me. Blossoms have been as large as 5 inches in diameter. I think the green eye makes it particularl...Read More

F
Manchester, NH | September 2005 | positive

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 ...Read More

L
Ithaca, NY (Zone 5b) | October 2004 | positive

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 deligh...Read More

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