Horsetail Milkweed
Asclepias verticillata
Last reviewed: June 2026
Horsetail Milkweed is toxic to dogs and cats.
Listed as toxic by the ASPCA Animal Poison Control Center (last reviewed 2026-05-21). If your pet has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435and your veterinarian's emergency line.
Pollinator Patch flags toxic plants so you can choose a pet-safe native alternative for your yard.
Light
full sun
Water
low
Size
12"–36" H × 12"–24" W
Bloom
Jun, Jul, Aug
Native to
AL, AR, AZ, CT and 33 more states
Pollinators
bees, butterflies, beetles
Browse plants for this ecoregion
Horsetail milkweed is a compact native perennial with narrow, whorled leaves and small clusters of white flowers that bloom throughout summer. This drought-tolerant plant forms neat clumps and is one of the more refined-looking milkweed species. It goes dormant in winter, disappearing completely until spring regrowth.
In an HOA neighborhood
Horsetail Milkweed is an HOA-friendly choice. Maintenance level: low. Tidiness: 4 out of 5.
Works well in: mid zone, foundation, front yard.
- Completely disappears in winter dormancy
- May need explanation as milkweed to gain HOA acceptance
Wildlife value
Host plant for monarch butterfly, milkweed tussock moth.
Essential host plant for monarch butterfly caterpillars and provides nectar for various butterflies, bees, and beetles. The flowers are particularly attractive to small native bees and beneficial insects.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Pollinator Patch flags toxic plants like Horsetail Milkweed and shows pet-safe natives for your ecoregion instead.