Swamp Milkweed

Asclepias incarnata L. - Milkweed family

Size

Mature Height: Up to around 4.9 feet

Planting Distance: 29 inches

Plant Type: Forb/herb

Root Depth: 18 inches

Growth Form: Rhizomatous

Growth Rate: Moderate

Features

Flower Color: Red

Conspicuous Flowers: Yes

Bloom Time: Fall

Seasonal Growth: Spring

Evergreen: No

Fall Colors: No

Conditions

Shade Tolerance: Intolerant

Clay Soil Tolerance: Yes

Sandy Soil Tolerance: No

Drought Tolerance: None

Flood Tolerance: High

Fire Tolerance: Low

Salt Tolerance: None

Ecosystem Interactions

Pollinators: Native Bees; Bombus; Honey Bees; Beetles, Wasps, Flies; Moths; Butterflies; Monarchs; Nesting and Structure (Bees); Larval Host (Monarch); Larval Host (Butterfly); Larval Host (Moth); Hummingbirds

Larval Species depending on Swamp Milkweed: Danaus gilippus, Danaus plexippus, Trichordestra legitima

Native Range

  • USA:  Alabama, Arkansas, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Pennsylvania, Rhode I., South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, West Virginia, Wisconsin, Wyoming
  • CAN:  Manitoba, New Brunswick, Nova Scotia, Ontario, Prince Edward I., Québec
  • MEX:  Mexico Northeast
Regional Native Status: L48 (N), 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.