Prairie Milkweed (Asclepias sullivantii) in the Milkweeds Database

Common names:
Give a thumbs up Prairie Milkweed
Give a thumbs up Sullivant's milkweed
Give a thumbs up Smooth milkweed
Give a thumbs up Milkweed

General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
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
Fruit: Showy
Other: Smooth seed pods (2-4" long) which split open when ripe releasing their numerous silky-tailed seeds for dispersal by the wind.
Flowers: Showy
Other: Flowers are a nectar source for many butterflies and leaves are a food source for monarch butterfly larvae (caterpillars).
Flower Color: Pink
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
Underground structures: Rhizome
Uses: Will Naturalize
Wildlife Attractant: Bees
Resistances: Deer Resistant
Rabbit Resistant
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
Pollinators: Wasps
Moths and Butterflies
Containers: Not suitable for containers


Photo gallery:

Posted by jmorth (central Illinois) on Feb 2, 2012 5:01 AM

Occasionally found in the northern two thirds of Illinois, rare elsewhere. It's presence is indicative .of a high quality moist to wet prairie. Summer bloomer.

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Discussion Threads about this plant
Thread Title Last Reply Replies
Milkweed ID Needed by jimard8 Jun 25, 2017 8:53 AM 8
Legal or illegal to pick michigan wildflower? by bhart90 Jul 24, 2016 12:15 PM 63
prairie milkweed ??? by Pegasys Jun 4, 2016 7:05 PM 9
June 2016 Butterflies, Moths & Larva by mellielong Jul 1, 2016 10:15 AM 329
OK Monarchs - Bring it on - I am ready by DavidLMO Aug 31, 2016 10:42 AM 124
Anyone Familiar with Restoring Prairie? by Chillybean Feb 15, 2016 1:15 PM 24

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