Index / Search / Asclepias incarnata
§1 Plant
Asclepias incarnata L.
vernacular swamp milkweed — species · Asclepiadaceae
§2Habit & range
Habit and range
- Growth habit
- Forb/herb
- Duration
- Perennial
- Group
- Dicot
- Family
- Asclepiadaceae Borkh.
- Genus
- Asclepias
§2a
Native status, by region
- CAN Canada Native
- L48 Lower 48 States Native
§2b
County-level range
· 436 counties across 17 states/territories§3Cultivation specs · USDA
Recorded by the USDA Plant Materials Program.
§3a
Tolerances
- Drought
- None
- Shade
- High
- Moisture use
- High
- Fire
- Low
- Salinity
- None
- Anaerobic
- High
- CaCO₃
- Medium
- Hedging
- None
§3b
Climate & soil
- Cold tolerance
- -38 °F minimum
- Frost-free days
- 107 min.
- Precipitation
- 15–65 in/yr
- pH range
- 5–8
- Root depth
- 18 in min.
- Fertility need
- Medium
- Soil texture
- medium, fine
§3c
Form & growth
- Growth form
- Rhizomatous
- Growth rate
- Moderate
- Lifespan
- Moderate
- Mature height
- 4.9 ft
- Foliage texture
- Coarse
- Foliage colour
- Green
- Porosity (summer)
- Moderate
- Porosity (winter)
- Porous
- Flower colour
- Red
- Fruit colour
- Brown
- Fire resistant
- Yes
- N fixation
- None
- Toxicity
- Moderate
§3d
Reproduction
- Bloom period
- Fall
- Seed abundance
- Medium
- Seed begins
- Spring
- Seed ends
- Fall
- Spread rate
- Slow
- Stratify
- No
- Seeds / lb
- 153,761
- Propagation
- seed, sprigs
§3e
Use & availability
- Commercial availability
- Routinely Available
- Nursery stock
- No
- Graze palatability
- Low
- Palatable, human
- No
- Protein potential
- Low
- Lumber
- No
- Christmas tree
- No
§4Counties, by state
Recorded in 436 counties across 17 states/territories.
Alabama view state ↗ 2 N ▾
Arkansas view state ↗ 5 N ▾
Delaware view state ↗ 3 N ▾
District of Columbia view state ↗ 1 N ▾
Florida view state ↗ 21 N ▾
Georgia view state ↗ 9 N ▾
Kentucky view state ↗ 72 N ▾
- Adair 21001
- Allen 21003
- Anderson 21005
- Ballard 21007
- Barren 21009
- Bath 21011
- Boone 21015
- Bourbon 21017
- Boyle 21021
- Bracken 21023
- Bullitt 21029
- Calloway 21035
- Campbell 21037
- Carlisle 21039
- Carroll 21041
- Carter 21043
- Casey 21045
- Christian 21047
- Clark 21049
- Daviess 21059
- Edmonson 21061
- Estill 21065
- Fayette 21067
- Fleming 21069
- Floyd 21071
- Franklin 21073
- Fulton 21075
- Garrard 21079
- Grant 21081
- Graves 21083
- Grayson 21085
- Greenup 21089
- Hardin 21093
- Harrison 21097
- Henderson 21101
- Henry 21103
- Hickman 21105
- Hopkins 21107
- Jackson 21109
- Jefferson 21111
- Jessamine 21113
- Kenton 21117
- Lee 21129
- Letcher 21133
- Lewis 21135
- Lincoln 21137
- Livingston 21139
- Madison 21151
- Marshall 21157
- Mason 21161
- McCracken 21145
- McCreary 21147
- McLean 21149
- Meade 21163
- Monroe 21171
- Montgomery 21173
- Muhlenberg 21177
- Ohio 21183
- Oldham 21185
- Owen 21187
- Pendleton 21191
- Powell 21197
- Pulaski 21199
- Robertson 21201
- Rockcastle 21203
- Rowan 21205
- Scott 21209
- Spencer 21215
- Todd 21219
- Warren 21227
- Wayne 21231
- Woodford 21239
Maine view state ↗ 14 N ▾
Massachusetts view state ↗ 14 N ▾
New Hampshire view state ↗ 10 N ▾
New Jersey view state ↗ 21 N ▾
New York view state ↗ 47 N ▾
- Albany 36001
- Bronx 36005
- Broome 36007
- Cattaraugus 36009
- Chautauqua 36013
- Chenango 36017
- Clinton 36019
- Columbia 36021
- Delaware 36025
- Dutchess 36027
- Erie 36029
- Essex 36031
- Franklin 36033
- Greene 36039
- Herkimer 36043
- Jefferson 36045
- Kings 36047
- Lewis 36049
- Livingston 36051
- Madison 36053
- Monroe 36055
- Nassau 36059
- New York 36061
- Oneida 36065
- Onondaga 36067
- Ontario 36069
- Orange 36071
- Orleans 36073
- Oswego 36075
- Otsego 36077
- Putnam 36079
- Queens 36081
- Richmond 36085
- Rockland 36087
- Saratoga 36091
- Schenectady 36093
- Schuyler 36097
- St. Lawrence 36089
- Suffolk 36103
- Sullivan 36105
- Tompkins 36109
- Ulster 36111
- Warren 36113
- Washington 36115
- Wayne 36117
- Westchester 36119
- Yates 36123
Pennsylvania view state ↗ 62 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
- Crawford 42039
- Cumberland 42041
- Dauphin 42043
- Delaware 42045
- Elk 42047
- Erie 42049
- Fayette 42051
- Forest 42053
- Franklin 42055
- 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
- Mifflin 42087
- Monroe 42089
- Montgomery 42091
- Montour 42093
- Northampton 42095
- Northumberland 42097
- Perry 42099
- Philadelphia 42101
- Pike 42103
- Schuylkill 42107
- Snyder 42109
- Somerset 42111
- Susquehanna 42115
- Union 42119
- Venango 42121
- Warren 42123
- Washington 42125
- Wayne 42127
- Westmoreland 42129
- York 42133
Rhode Island view state ↗ 5 N ▾
Vermont view state ↗ 13 N ▾
Virginia view state ↗ 96 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
- Charles City 51036
- Charlotte 51037
- Chesapeake (city) 51550
- Chesterfield 51041
- Clarke 51043
- 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
- 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
- Spotsylvania 51177
- Stafford 51179
- Surry 51181
- Sussex 51183
- Tazewell 51185
- Virginia Beach (city) 51810
- Warren 51187
- Washington 51191
- Westmoreland 51193
- Wise 51195
- Wythe 51197
- York 51199
West Virginia view state ↗ 41 N ▾
- Barbour 54001
- Berkeley 54003
- Brooke 54009
- Cabell 54011
- Fayette 54019
- Gilmer 54021
- Grant 54023
- Greenbrier 54025
- Hampshire 54027
- Hancock 54029
- Hardy 54031
- Harrison 54033
- Jackson 54035
- Jefferson 54037
- Lewis 54041
- Marion 54049
- Marshall 54051
- Mason 54053
- McDowell 54047
- Mercer 54055
- Mineral 54057
- Monongalia 54061
- Monroe 54063
- 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
- Upshur 54097
- Wayne 54099
- Wetzel 54103
- Wirt 54105
- Wyoming 54109
§5Sources & provenance
USDA PLANTS
Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.
plants.usda.gov/ASIN ↗GBIF Backbone
Canonical taxonomic identity, synonym resolution, cross-refs. CC0.
gbif.org/species/3170266 ↗Record version
Cached and built locally. Source version on this record:
usda-plants-mt-2026-05-26
fetched 2026-05-26T05:06:36Z