University of Wisconsin-Madison | Botany Plant Growth Facilities

Botanical Garden

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Genus: Asclepias Species: incarnata Common Name: Swamp Milkweed Family: Apocynaceae + Asclepiadaceae Order: Gentianales Native: Eastern North America Habit: Herbaceous Perennial Height: 3 to 5 feet Width: 2 to 3 feet Flowering Season: Summer Flower Color: Pink, mauve to rarely white Propagation: Seed or division Zone: 3-6 Note: This low-maintenance clump-forming plant is suitable for costal sites, and butterfly gardens. Prefers sunny, moist, well-drained, organic-rich, sandy-loam soil.