Asclepias perennis

Photographs belong to the photographers who allow use for FNPS purposes only. Please contact the photographer for all other uses.

Aquatic Milkweed, Swamp Milkweed


Plant Specifics

Size:1-3 ft tall by 1 ft wide
Life Span:Short-lived perennial
Flower Color:White
Phenology:Evergreen. Blooms periodically from spring to fall. Survives shade but blooms better in part-to-full sun.
Noted for:Showy flowers


Recommended Uses:Small specimen plant in wet areas.  Does well in bog gardens and rain gardens or bioswales.
Availability:Native nurseries, FNPS plant sales, Quality nurseries
Light: Full Sun,  Part Shade,  Shade
Moisture Tolerance:
always floodedextremely dry
 (Stays Wet ----- to ----- Somewhat moist, no flooding)
Moisture Tolerance: Stays Wet ----- to ----- Somewhat moist, no flooding
Salt Water Flooding Tolerance:Not salt tolerant of inundation by salty or brackish water.
Salt Spray/ Salty Soil Tolerance:Low/no tolerance of salty wind or direct salt spray
Soil or other substrate:Loam, Organic material (muck), Sand
Soil pH:Adaptable



Larval host to the monarch butterfly (Danaus plexippus), queen butterfly (Danaus gilippus), and soldier butterfly, (Danaus eresimus).

Attracts various pollinators including butterflies and bees.

Native Habitats:Marshes, swamps

Distribution and Planting Zones

Natural Range in Florida
USDA Zones

Suitable to grow in:
10A 10B 8A 8B 9A 9B 

USDA zones are based on minimum winter temperatures