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Aquatic Milkweed
Asclepias perennis
Aquatic Milkweed is a vital plant for native and waterwise gardens, thriving in moist to wet environments. It typically grows to a modest 2 feet in height and features lance-shaped, glossy leaves. From late spring to early summer, it produces small, fragrant white flowers that serve as an important nectar source for bees, butterflies, and other pollinators. Like other milkweeds, this plant is especially crucial for monarch butterflies, serving as a host plant on which their caterpillars feed.
Details
Height18” - 24”
Spread18"
Bloom SeasonMay – September
Soil Types
Clay
Loam
Sand
Soil Moisture
Moist
Wet
Sun Exposure
Part Sun
Full Sun
Range Map
Available
Not available
Ecological Benefits
Maintenance Tips
- Prefers consistently moist soil; ideal for planting in bog gardens or near water features where the soil remains consistently moist to wet.
- Deadhead spent blooms to encourage more flowers. Cut back in late autumn or early spring to promote vigorous new growth.
- Divide clumps in the spring every few years to rejuvenate and propagate the plant.
- Monitor for pests such as aphids but manage plants carefully to preserve beneficial insects like monarch caterpillars.



