Index / Search / Rudbeckia hirta
§1 Plant
Rudbeckia hirta L.
vernacular blackeyed Susan — species · Asteraceae
§2Habit & range
Habit and range
- Growth habit
- Forb/herb
- Duration
- Annual, Biennial, Perennial
- Group
- Dicot
- Family
- Asteraceae Bercht. & J. Presl
- Genus
- Rudbeckia
§2a
Native status, by region
- AK Alaska Introduced
- CAN Canada Native
- L48 Lower 48 States Native
§2b
County-level range
· 718 counties across 21 states/territories§3Cultivation specs · USDA
Recorded by the USDA Plant Materials Program.
§3a
Tolerances
- Drought
- Medium
- Shade
- High
- Moisture use
- Medium
- Fire
- Medium
- Salinity
- None
- Anaerobic
- None
- CaCO₃
- None
- Hedging
- None
§3b
Climate & soil
- Cold tolerance
- -23 °F minimum
- Frost-free days
- 150 min.
- Precipitation
- 28–65 in/yr
- pH range
- 6–7
- Root depth
- 10 in min.
- Fertility need
- Medium
- Soil texture
- medium, fine
§3c
Form & growth
- Growth form
- Single Stem
- Growth rate
- Rapid
- Lifespan
- Short
- Mature height
- 1 ft
- Foliage texture
- Coarse
- Foliage colour
- Green
- Porosity (summer)
- Porous
- Porosity (winter)
- Porous
- Flower colour
- Orange
- Fruit colour
- Brown
- Fire resistant
- No
- N fixation
- None
- Toxicity
- None
§3d
Reproduction
- Bloom period
- Summer
- Seed abundance
- High
- Seed begins
- Summer
- Seed ends
- Summer
- Spread rate
- Moderate
- Stratify
- No
- Seeds / lb
- 1,575,760
- Propagation
- seed
§3e
Use & availability
- Commercial availability
- Routinely Available
- Nursery stock
- No
- Browse palatability
- Low
- Graze palatability
- Low
- Palatable, human
- No
- Protein potential
- Low
- Lumber
- No
- Christmas tree
- No
§4Counties, by state
Recorded in 718 counties across 21 states/territories.
Alabama view state ↗ 13 N ▾
Alaska view state ↗ 1 I ▾
Arkansas view state ↗ 75 N ▾
- Arkansas 05001
- Ashley 05003
- Baxter 05005
- Benton 05007
- Boone 05009
- Bradley 05011
- Calhoun 05013
- Carroll 05015
- Chicot 05017
- Clark 05019
- Clay 05021
- Cleburne 05023
- Cleveland 05025
- Columbia 05027
- Conway 05029
- Craighead 05031
- Crawford 05033
- Crittenden 05035
- Cross 05037
- Dallas 05039
- Desha 05041
- Drew 05043
- Faulkner 05045
- Franklin 05047
- Fulton 05049
- Garland 05051
- Grant 05053
- Greene 05055
- Hempstead 05057
- Hot Spring 05059
- Howard 05061
- Independence 05063
- Izard 05065
- Jackson 05067
- Jefferson 05069
- Johnson 05071
- Lafayette 05073
- Lawrence 05075
- Lee 05077
- Lincoln 05079
- Little River 05081
- Logan 05083
- Lonoke 05085
- Madison 05087
- Marion 05089
- Miller 05091
- Mississippi 05093
- Monroe 05095
- Montgomery 05097
- Nevada 05099
- Newton 05101
- Ouachita 05103
- Perry 05105
- Phillips 05107
- Pike 05109
- Poinsett 05111
- Polk 05113
- Pope 05115
- Prairie 05117
- Pulaski 05119
- Randolph 05121
- Saline 05125
- Scott 05127
- Searcy 05129
- Sebastian 05131
- Sevier 05133
- Sharp 05135
- St. Francis 05123
- Stone 05137
- Union 05139
- Van Buren 05141
- Washington 05143
- White 05145
- Woodruff 05147
- Yell 05149
Delaware view state ↗ 1 N ▾
District of Columbia view state ↗ 1 N ▾
Florida view state ↗ 53 N ▾
- Alachua 12001
- Brevard 12009
- Calhoun 12013
- Charlotte 12015
- Citrus 12017
- Clay 12019
- Collier 12021
- Columbia 12023
- Dixie 12029
- Duval 12031
- Escambia 12033
- Flagler 12035
- Gadsden 12039
- Glades 12043
- Gulf 12045
- Hamilton 12047
- Hardee 12049
- Hendry 12051
- Hernando 12053
- Holmes 12059
- Indian River 12061
- Jackson 12063
- Jefferson 12065
- Lake 12069
- Lee 12071
- Leon 12073
- Levy 12075
- Madison 12079
- Manatee 12081
- Marion 12083
- Martin 12085
- Miami-Dade 12086
- Nassau 12089
- Okaloosa 12091
- Okeechobee 12093
- Orange 12095
- Osceola 12097
- Palm Beach 12099
- Pasco 12101
- Pinellas 12103
- Polk 12105
- Putnam 12107
- Santa Rosa 12113
- Sarasota 12115
- Seminole 12117
- St. Johns 12109
- St. Lucie 12111
- Sumter 12119
- Suwannee 12121
- Taylor 12123
- Volusia 12127
- Wakulla 12129
- Walton 12131
Georgia view state ↗ 46 N ▾
- Baker 13007
- Banks 13011
- Bartow 13015
- Brooks 13027
- Burke 13033
- Chatham 13051
- Cherokee 13057
- Clarke 13059
- Clay 13061
- Colquitt 13071
- Columbia 13073
- Dade 13083
- Dawson 13085
- Elbert 13105
- Emanuel 13107
- Fannin 13111
- Floyd 13115
- Forsyth 13117
- Fulton 13121
- Gordon 13129
- Grady 13131
- Hall 13139
- Irwin 13155
- Jackson 13157
- Jasper 13159
- Jefferson 13163
- Jones 13169
- Lanier 13173
- Laurens 13175
- Lee 13177
- Lowndes 13185
- Lumpkin 13187
- Macon 13193
- Madison 13195
- Morgan 13211
- Muscogee 13215
- Oconee 13219
- Screven 13251
- Spalding 13255
- Stephens 13257
- Tift 13277
- Union 13291
- Walker 13295
- Wayne 13305
- White 13311
- Worth 13321
Kentucky view state ↗ 89 N ▾
- Adair 21001
- Allen 21003
- Anderson 21005
- Ballard 21007
- Barren 21009
- Bath 21011
- Bell 21013
- Boone 21015
- Bracken 21023
- Breathitt 21025
- Breckinridge 21027
- Bullitt 21029
- Butler 21031
- Caldwell 21033
- Calloway 21035
- Campbell 21037
- Carlisle 21039
- Carroll 21041
- Carter 21043
- Casey 21045
- Christian 21047
- Clark 21049
- Clinton 21053
- Edmonson 21061
- Elliott 21063
- Estill 21065
- Fayette 21067
- Fleming 21069
- Floyd 21071
- Franklin 21073
- Fulton 21075
- Gallatin 21077
- Garrard 21079
- Grayson 21085
- Green 21087
- Hancock 21091
- Hardin 21093
- Harrison 21097
- Hart 21099
- Henry 21103
- Hickman 21105
- Hopkins 21107
- Jackson 21109
- Jefferson 21111
- Kenton 21117
- Knott 21119
- Laurel 21125
- Lawrence 21127
- Lee 21129
- Letcher 21133
- Lewis 21135
- Lincoln 21137
- Logan 21141
- Lyon 21143
- Madison 21151
- Magoffin 21153
- Marion 21155
- Marshall 21157
- Martin 21159
- McCracken 21145
- McCreary 21147
- McLean 21149
- Meade 21163
- Menifee 21165
- Montgomery 21173
- Morgan 21175
- Muhlenberg 21177
- Nelson 21179
- Ohio 21183
- Oldham 21185
- Owsley 21189
- Pendleton 21191
- Perry 21193
- Pike 21195
- Powell 21197
- Pulaski 21199
- Robertson 21201
- Rockcastle 21203
- Rowan 21205
- Simpson 21213
- Spencer 21215
- Todd 21219
- Trigg 21221
- Union 21225
- Warren 21227
- Washington 21229
- Wayne 21231
- Whitley 21235
- Wolfe 21237
Louisiana view state ↗ 45 N ▾
- Acadia 22001
- Allen 22003
- Avoyelles 22009
- Beauregard 22011
- Bienville 22013
- Bossier 22015
- Caddo 22017
- Calcasieu 22019
- Caldwell 22021
- Cameron 22023
- Catahoula 22025
- Claiborne 22027
- De Soto 22031
- East Baton Rouge 22033
- East Carroll 22035
- East Feliciana 22037
- Evangeline 22039
- Franklin 22041
- Grant 22043
- Iberia 22045
- Jackson 22049
- Jefferson Davis 22053
- LaSalle 22059
- Lincoln 22061
- Livingston 22063
- Madison 22065
- Morehouse 22067
- Natchitoches 22069
- Ouachita 22073
- Pointe Coupee 22077
- Rapides 22079
- Red River 22081
- Richland 22083
- Sabine 22085
- St. Helena 22091
- St. Tammany 22103
- Tangipahoa 22105
- Union 22111
- Vermilion 22113
- Vernon 22115
- Washington 22117
- Webster 22119
- West Carroll 22123
- West Feliciana 22125
- Winn 22127
Maine view state ↗ 16 N ▾
Massachusetts view state ↗ 14 N ▾
Mississippi view state ↗ 14 N ▾
New Hampshire view state ↗ 10 N ▾
New Jersey view state ↗ 19 N ▾
New York view state ↗ 36 N ▾
- Albany 36001
- Allegany 36003
- Bronx 36005
- Broome 36007
- Cattaraugus 36009
- Columbia 36021
- Delaware 36025
- Dutchess 36027
- Erie 36029
- Essex 36031
- Kings 36047
- Lewis 36049
- Madison 36053
- Monroe 36055
- Nassau 36059
- New York 36061
- Oneida 36065
- Onondaga 36067
- Ontario 36069
- Orange 36071
- Otsego 36077
- Putnam 36079
- Queens 36081
- Rensselaer 36083
- Richmond 36085
- Rockland 36087
- Saratoga 36091
- Schoharie 36095
- St. Lawrence 36089
- Suffolk 36103
- Tioga 36107
- Ulster 36111
- Warren 36113
- Washington 36115
- Wayne 36117
- Westchester 36119
North Carolina view state ↗ 58 N ▾
- Alexander 37003
- Alleghany 37005
- Ashe 37009
- Avery 37011
- Brunswick 37019
- Buncombe 37021
- Burke 37023
- Cabarrus 37025
- Caldwell 37027
- Carteret 37031
- Catawba 37035
- Cherokee 37039
- Chowan 37041
- Clay 37043
- Cleveland 37045
- Columbus 37047
- Craven 37049
- Davidson 37057
- Duplin 37061
- Durham 37063
- Edgecombe 37065
- Forsyth 37067
- Gaston 37071
- Graham 37075
- Halifax 37083
- Haywood 37087
- Henderson 37089
- Hertford 37091
- Hoke 37093
- Iredell 37097
- Jackson 37099
- Johnston 37101
- Lincoln 37109
- Macon 37113
- Madison 37115
- McDowell 37111
- Mecklenburg 37119
- Mitchell 37121
- Onslow 37133
- Pamlico 37137
- Pender 37141
- Person 37145
- Pitt 37147
- Polk 37149
- Randolph 37151
- Robeson 37155
- Rowan 37159
- Sampson 37163
- Stokes 37169
- Surry 37171
- Swain 37173
- Transylvania 37175
- Union 37179
- Wake 37183
- Watauga 37189
- Wayne 37191
- Wilkes 37193
- Yancey 37199
Pennsylvania view state ↗ 63 N ▾
- Adams 42001
- Allegheny 42003
- Armstrong 42005
- Beaver 42007
- Bedford 42009
- Berks 42011
- Blair 42013
- Bradford 42015
- Bucks 42017
- Butler 42019
- Cambria 42021
- Cameron 42023
- Carbon 42025
- Centre 42027
- Chester 42029
- Clarion 42031
- Clearfield 42033
- Clinton 42035
- Columbia 42037
- Crawford 42039
- Cumberland 42041
- Dauphin 42043
- Delaware 42045
- Elk 42047
- Erie 42049
- Fayette 42051
- Forest 42053
- Fulton 42057
- Greene 42059
- Huntingdon 42061
- Indiana 42063
- Jefferson 42065
- Juniata 42067
- Lackawanna 42069
- Lancaster 42071
- Lawrence 42073
- Lebanon 42075
- Lehigh 42077
- Luzerne 42079
- Lycoming 42081
- McKean 42083
- Mercer 42085
- Monroe 42089
- Montgomery 42091
- Northampton 42095
- Northumberland 42097
- Perry 42099
- Philadelphia 42101
- Pike 42103
- Potter 42105
- Schuylkill 42107
- Snyder 42109
- Somerset 42111
- Sullivan 42113
- Susquehanna 42115
- Tioga 42117
- Union 42119
- Venango 42121
- Warren 42123
- Washington 42125
- Wayne 42127
- Westmoreland 42129
- York 42133
Rhode Island view state ↗ 5 N ▾
Vermont view state ↗ 12 N ▾
Virginia view state ↗ 97 N ▾
- Accomack 51001
- Albemarle 51003
- Alleghany 51005
- Amelia 51007
- Amherst 51009
- Appomattox 51011
- Arlington 51013
- Augusta 51015
- Bath 51017
- Bedford 51019
- Bland 51021
- Botetourt 51023
- Brunswick 51025
- Buchanan 51027
- Buckingham 51029
- Campbell 51031
- Caroline 51033
- Carroll 51035
- Charlotte 51037
- Chesapeake (city) 51550
- Chesterfield 51041
- Clarke 51043
- Craig 51045
- Culpeper 51047
- Cumberland 51049
- Dickenson 51051
- Dinwiddie 51053
- Essex 51057
- Fairfax 51059
- Fauquier 51061
- Floyd 51063
- Fluvanna 51065
- Franklin 51067
- Frederick 51069
- Giles 51071
- Gloucester 51073
- Goochland 51075
- Grayson 51077
- Greene 51079
- Greensville 51081
- Halifax 51083
- Hampton (city) 51650
- Hanover 51085
- Henrico 51087
- Henry 51089
- Highland 51091
- Isle of Wight 51093
- James City 51095
- King and Queen 51097
- King George 51099
- King William 51101
- Lancaster 51103
- Lee 51105
- Loudoun 51107
- Louisa 51109
- Lunenburg 51111
- Madison 51113
- Mathews 51115
- Mecklenburg 51117
- Middlesex 51119
- Montgomery 51121
- Nelson 51125
- New Kent 51127
- Newport News (city) 51700
- Northampton 51131
- Northumberland 51133
- Nottoway 51135
- Orange 51137
- Page 51139
- Patrick 51141
- Pittsylvania 51143
- Powhatan 51145
- Prince Edward 51147
- Prince George 51149
- Prince William 51153
- Pulaski 51155
- Rappahannock 51157
- Richmond 51159
- Roanoke 51161
- Rockbridge 51163
- Rockingham 51165
- Russell 51167
- Scott 51169
- Shenandoah 51171
- Smyth 51173
- Southampton 51175
- Spotsylvania 51177
- Stafford 51179
- Suffolk (city) 51800
- Surry 51181
- Sussex 51183
- Tazewell 51185
- Warren 51187
- Washington 51191
- Westmoreland 51193
- Wise 51195
- York 51199
West Virginia view state ↗ 50 N ▾
- Barbour 54001
- Berkeley 54003
- Braxton 54007
- Brooke 54009
- Cabell 54011
- Calhoun 54013
- Clay 54015
- Doddridge 54017
- Fayette 54019
- Gilmer 54021
- Grant 54023
- Greenbrier 54025
- Hampshire 54027
- Hancock 54029
- Hardy 54031
- Harrison 54033
- Jackson 54035
- Jefferson 54037
- Kanawha 54039
- Lewis 54041
- Lincoln 54043
- Marion 54049
- Marshall 54051
- Mason 54053
- McDowell 54047
- Mercer 54055
- Mineral 54057
- Monongalia 54061
- Monroe 54063
- Morgan 54065
- Nicholas 54067
- Ohio 54069
- Pleasants 54073
- Pocahontas 54075
- Preston 54077
- Putnam 54079
- Raleigh 54081
- Randolph 54083
- Ritchie 54085
- Roane 54087
- Summers 54089
- Taylor 54091
- Tucker 54093
- Tyler 54095
- Upshur 54097
- Wayne 54099
- Webster 54101
- Wetzel 54103
- Wirt 54105
- Wood 54107
§5Sources & provenance
USDA PLANTS
Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.
plants.usda.gov/RUHI2 ↗GBIF Backbone
Canonical taxonomic identity, synonym resolution, cross-refs. CC0.
gbif.org/species/3114225 ↗Record version
Cached and built locally. Source version on this record:
usda-plants-mt-2026-05-26
fetched 2026-05-26T05:45:41Z