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.
Photo: Lunch at English Wikipedia, Wikimedia Commons (CC BY-SA 3.0)
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 | 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 |
Reported toxic to animals and probably humans; sap of some Asclepias species causes skin irritation.
Buying it
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
See where to buy →Quick answers about Antelope-horns milkweed
Where is Antelope-horns milkweed native?
Antelope-horns milkweed (Asclepias asperula) is native to Arizona and Texas. Check your state's page in this directory for the full list of plants native where you live.
When does Antelope-horns milkweed bloom?
Antelope-horns milkweed blooms Mar-Oct (heaviest spring). Exact timing shifts a few weeks with latitude and elevation.
What growing conditions does Antelope-horns milkweed need?
Light: Sun. Water: Medium water, Dry-Moist. Soil: Rocky or sandy soils of prairies, pastures, plains, hillsides, brushlands, woodlands. Mature height: 1-2 ft.
Is Antelope-horns milkweed good for pollinators and wildlife?
Yes. Wildlife value: Attracts native/bumble/honey bees, larval host for Monarch and Queen butterflies.
Is Antelope-horns milkweed deer-resistant or drought-tolerant?
Antelope-horns milkweed is deer-resistant and drought-tolerant.
Is Antelope-horns milkweed toxic?
Reported toxic to animals and probably humans; sap of some Asclepias species causes skin irritation.
Where can I buy real Antelope-horns milkweed seed or plants?
We found a listing sold as seeds that names the true species, last checked 15 Sep 2026. Look for the scientific name Asclepias asperula on any listing.
Similar native plants
Native plants that share growing conditions or range with Antelope-horns milkweed.
- American century plant Agave americana
- Butterflyweed Asclepias tuberosa
- Whorled milkweed Asclepias verticillata
- Texas sacahuista Nolina texana
- Twistleaf yucca Yucca rupicola
- Yellow bells (esperanza) Tecoma stans
Also listed under
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