Special Hours

The U.S. Botanic Garden Conservatory will close at 3 p.m. on Tuesday, December 6, due to an official government function. The Conservatory will return to normal hours December 7.

Swamp milkweed

Swamp milkweed (Asclepias incarnata)
Plant Botanical Name: 
Asclepias incarnata
Plant Sub Species or Variety: 
ssp. pulchra
USBG Plant Location: 
National Garden
Sunlight: 
full sun
Plant Moisture Requirements: 
medium to wet

Swamp milkweed is an excellent choice for moist to wet locations. It serves as a larval host for monarch butterflies.