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Swamp milkweed is an herbaceous perennial in the Apocynaceae (dogbane) family. Apocynum is the Greek term for “dog-away”. It is native to central and eastern United States and tends to grow in wet sites along streams, ponds, or bogs. 

Plant swamp milkweed in full sun to partial shade in soils with neutral to acidic pH. It is native to wet sites but adapts to drier sites in moist clay or loam soils. 

The attractive pink to rose-purple flowers mature in mid-spring and last into early fall. The seed pods split open to release seeds that float on the wind. Milkweed is an important food source for Monarch butterfly caterpillars and the flowers are visited by many pollinators.  It is resistant to browsing by deer.

Use as an accent or border in a meadow, native, or pollinator garden. It will be at home in a naturalized area or along a pond or stream where it can grow up to 5 feet tall and spread 2 to 3 feet wide.

Asclepias incarnata, Swamp Milkweed

SKU: 2909331819861
  • Common Name Swamp Milkweed
    Plant Type Perennial
    Zone 3a-9b
    Height 3-5'
    Width 2-3'
    Growth Habit Upright, Clumping
    Growth Rate Medium
    Bloom Time Summer

    Full Sun (>6 hrs. Direct Sun)

    Partial Shade (Direct sunlight only part of the day, 2-6 hours)

    Water Needs

    Good Drainage


    Occasionally Wet

    Soil Type


    High Organic Matter

    Loam (Silt)

    Tolerance Wet soil




    Native to North America

    Central & E. Canada to W. Central & E. U.S.A.

    Attracts Wings:        

    Attracts Butterflies   

    Monarch Butterfly Host Plant               



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