Asclepias perennis

Photo by Ginny Stibolt. Photograph belongs to the photographer who allows use for FNPS purposes only. Please contact the photographer for all other uses.

Natural Range in Florida
USDA Zones

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

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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.
Habitats:Marshes, swamps


Recommended Uses:Small specimen plant in wet areas.  Does well in bog gardens and rain gardens or bioswales.
Light: Full Sun,  Part Shade,  Shade
Moisture Tolerance:
always floodedextremely dry
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 Tolerance:Low/no tolerance of salty wind or direct salt spray
Soil/Substrate:Loam, Organic material (muck), Sand



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

Attracts various pollinators including butterflies and bees.