Quick answer: Purple milkweed (Asclepias purpurascens) is native to 20 states. What's commonly sold under this name is the true wild species. It's typically seed, verified 16 Sep 2026.
Photo: Jidanni, Wikimedia Commons (CC BY-SA 4.0)
Where it's native
Listed in the directory as native to these states. Click a state for its full native-plant guide.
Growing conditions
From the Lady Bird Johnson Wildflower Center Native Plant Database.
| Sun | Sun |
|---|---|
| Water | Dry |
| Soil | Not recorded in the wildflower.org profile |
| Bloom | Bloom May-Jul |
| Height | Up to 4 ft tall |
| Wildlife value | Special value to native/bumble/honey bees, attracts butterflies, supports conservation biological control |
All parts poisonous, toxic only in large quantities; symptoms: vomiting, stupor, weakness, spasms
Endangered in MA and WI; no extant populations in RI (conservation concern, not invasive)
Buying it
Sold true to the wild species as of the last check (16 Sep 2026), via Amazon.
Sold as: Seed via Amazon · listing verified 16 Sep 2026
See where to buy →Quick answers about Purple milkweed
Where is Purple milkweed native?
Purple milkweed (Asclepias purpurascens) is native to 20 states across the Northeast, Midwest and South. Check your state's page in this directory for the full list of plants native where you live.
When does Purple milkweed bloom?
Purple milkweed blooms May-Jul. Exact timing shifts a few weeks with latitude and elevation.
What growing conditions does Purple milkweed need?
Light: Sun. Water: Dry. Mature height: Up to 4 ft tall.
Is Purple milkweed good for pollinators and wildlife?
Yes. Wildlife value: Special value to native/bumble/honey bees, attracts butterflies, supports conservation biological control.
Is Purple milkweed deer-resistant or drought-tolerant?
Purple milkweed is deer-resistant and drought-tolerant.
Is Purple milkweed toxic?
All parts poisonous, toxic only in large quantities; symptoms: vomiting, stupor, weakness, spasms.
Where can I buy real Purple milkweed seed or plants?
We found a listing sold as seed that names the true species, last checked 16 Sep 2026. Look for the scientific name Asclepias purpurascens on any listing.
Similar native plants
Native plants that share growing conditions or range with Purple milkweed.
- Sweet-fern Comptonia peregrina
- Adam's needle Yucca filamentosa
- Brown-eyed Susan Rudbeckia triloba
- Hairy beardtongue Penstemon hirsutus
- Low prickly pear Opuntia humifusa
- Hollow Joe-pye weed Eutrochium fistulosum
Also listed under
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