Longleaf Milkweed
Asclepias longifolia
Last reviewed: June 2026
Longleaf 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, DE, FL, GA and 7 more states
Pollinators
bees, butterflies, moths
Longleaf milkweed is a native perennial with narrow, lance-shaped leaves and clusters of small white or greenish-white flowers that bloom through summer. This drought-tolerant plant forms neat clumps and is less aggressive than common milkweed, making it suitable for cultivated gardens. It goes dormant in winter, disappearing completely until spring growth emerges.
In an HOA neighborhood
Longleaf Milkweed is an HOA-friendly choice. Maintenance level: low. Tidiness: 3 out of 5.
Works well in: mid zone, foundation, backyard only.
- Completely disappears in winter which may look unplanted
- Name contains 'milkweed' which some may associate with weeds
Wildlife value
Host plant for monarch butterfly.
Essential host plant for monarch butterfly caterpillars and provides nectar for various bees, butterflies, and moths. The flowers are particularly attractive to native bees and smaller butterfly species.
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 Longleaf Milkweed and shows pet-safe natives for your ecoregion instead.