Quick answer: Antelope-horns milkweed (Asclepias asperula) is native to 2 states. What's commonly sold under this name is the true wild species. It's typically seeds, verified 15 Sep 2026.
Where it's native
Listed in the register 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 | Medium water, Dry-Moist |
| Soil | Rocky or sandy soils of prairies, pastures, plains, hillsides, brushlands, woodlands |
| Bloom | Mar-Oct (heaviest spring) |
| Height | 1-2 ft |
| Wildlife value | Attracts native/bumble/honey bees; larval host for Monarch and Queen butterflies |
Toxicity
Reported toxic to animals and probably humans; sap of some Asclepias species causes skin irritation.
Buying it
Wild species
Sold true to the wild species as of the last check (15 Sep 2026), via Amazon.
Sold as: Seeds via Amazon · listing verified 15 Sep 2026
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