Swamp Milkweed (Asclepias perennis)

Swamp milkweed (Asclepias perennis)
Swamp Milkweed (Asclepias perennis)

Common Names

swamp milkweed and white milkweed

Latin Name

Asclepias perennis


Asclepias perennis is is in the Apocynaceae, or dogbane, Family.


Swamp milkweed is a perennial wildflower that grows to a height of about 2 feet.

Swamp Milkweed (Asclepias perennis)
Swamp Milkweed (Asclepias perennis)


The leaves are opposite with entire margins. They are stalked and are elliptic to lanceolate in shape.  When broken the leaves exude a milky sap.

Swamp Milkweed (Asclepias perennis)
Swamp Milkweed (Asclepias perennis)


The white flowers appear in umbels at the end of the plant stalks. Flowering occurs in the spring, summer and fall.


Swamp milkweed grows in moist areas such as wet woods, stream banks, river banks, ditches, cypress swamps and wet ditches.

Swamp Milkweed (Asclepias perennis)
Swamp Milkweed (Asclepias perennis)

Native Range

Asclepias perennis is native to the following states: AL, AR, FL, GA, IL, IN, KY, LA, MO, MS, SC, TN, and TX.

Landscape Use

In the home landscape it grows in full sun with average to moist soils. It needs a good source of sunlight in order for it to produce flowers, and constant moisture to keep it thriving. It can be grown in containers if given constant moisture.

Wildlife Uses:

The flowers are a source of nectar for many insects including bees, beetles, butterflies, flies, and wasps. The foliage, and seed pods, are larval food for the monarch, queen, and soldier butterflies.


Can be grown easily from seed and transplanted when small. It can also be propagated by cuttings.

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