Blackeyed Susan
Rudbeckia hirta L.
Aster family
Plant Type
Forb/herb
Life Cycle
Annual, Biennial, Perennial
Mature Height
12 inches
Flower Color
Orange
Bloom Time
Summer
Growing Conditions
Light
Shade Tolerance
Intolerant
Water
Water Use
Medium
Drought Tolerance
Medium
Flood Tolerance
None
Soil
Soil Types
Clay, Loam
CaCO3 Tolerance
None
Fertility Need
Medium
Stress Tolerance
Fire Tolerance
Medium
Salt Tolerance
None
Climate
pH Range
6.0 – 7.0
Frost-Free Days
150 days
Precipitation
28 – 65 in
Ecosystem & Wildlife
Pollinators
Native Bees; Bombus; Honey Bees; Beetles, Wasps, Flies; Moths; Butterflies; Larval Host (Butterfly); Larval Host (Moth)
Larval Host
Charidryas gorgone carlota, Charidryas nycteis, Chlorochlamys chloroleucaria, Chlosyne nycteis, Isophrictis similiella, Papaipema nebris, Synchlora aerata, Synchlora aerata aerata
Fall Color
No
Evergreen
No
Native Range
- USA: Alabama, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Nebraska, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode I., South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming
- CAN: Alberta, British Columbia, Manitoba, New Brunswick, Nova Scotia, Ontario, Prince Edward I., Québec, Saskatchewan
Regional Native Status: L48 (N), AK (I), CAN (N)
State-level native status is based on data available through Plants of the World Online. Regional Native Status comes from the USDA Plants Database. For more detailed native status information, please refer to BONAP.
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