|Sun Requirements:||Full Sun to Partial Shade
|Water Preferences:||Wet Mesic
|Minimum cold hardiness:||Zone 3 -40 °C (-40 °F) to -37.2 °C (-35)
|Maximum recommended zone:||Zone 7b
|Plant Height:||24 - 48 inches|
|Plant Spread:||12 - 18 inches|
|Leaves:||Other: Smooth milkweed (also commonly known as Sullivant's milkweed and prairie milkweed) is a rough, weedy perennial which is very similar to common milkweed (Asclepias syriaca) except smooth milkweed has (a) smooth (glabrous) stems, leaves and seed pods, (b) l
Other: Smooth seed pods (2-4" long) which split open when ripe releasing their numerous silky-tailed seeds for dispersal by the wind.
Other: Flowers are a nectar source for many butterflies and leaves are a food source for monarch butterfly larvae (caterpillars).
Other: Pinkish-white to pinkish-purple
|Bloom Size:||Under 1"
|Flower Time:||Late spring or early summer
Other: Long bloom period from late spring well into summer
|Toxicity:||Leaves are poisonous
Roots are poisonous
|Propagation: Seeds:||Provide light
Stratify seeds: 1 month at 40 degrees
Suitable for wintersowing
Other info: Easily grown from seed, and may self-seed in the landscape if seed pods are not removed prior to splitting open.
|Propagation: Other methods:||Division
Moths and Butterflies
|Containers:||Not suitable for containers
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