Asclepias incarnata, commonly called swamp milkweed, is an erect, clump-forming, native plant which is commonly found in swamps, river bottomlands and wet meadows. Stems exude a toxic milky sap when cut. Small, fragrant, pink to mauve flowers appear in tight clusters at the stem ends in summer. Flowers are followed by attractive seed pods (to 4" long) which split open when ripe, releasing silky-haired seeds easily carried by the wind. Flowers are very attractive to butterflies as a nectar source. In addition, swamp milkweed is an important food source for the larval stage of Monarch butterflies.
Easily grown in medium to wet soils in full sun. Surprisingly tolerant of average well-drained soils in cultivation even though the species is native to swamps and wet meadows. Plants have deep taproots and are best left undisturbed once established. Foliage is slow to emerge in spring.
Type: Herbaceous perennial
Zone: 3 to 6
Height: 4.00 to 5.00 feet
Spread: 2.00 to 3.00 feet
Bloom Time: July to August
Bloom Description: White, pink, mauve
Sun: Full sun
Water: Medium to wet
Flower: Showy, Fragrant
Tolerate: Deer, Clay Soil, Wet Soil