Commonly known as Desert Milkweed, Rush Milkweed, or Cane Milkweed. Asclepius subulate is an evergreen perennial that grows striking vertical gray-green succulent stems that bear small linear leaves only after rain and are otherwise naked. From mid-spring to winter, small clusters of white flowers open from creamy yellow buds and provide nectar for butterflies, bees, and other pollinators. Desert Milkweed is also a larval food source for monarch and queen butterfly caterpillars.
Native to the Southwestern U.S., this perennial is drought and heat tolerant once established. It is the only evergreen milkweed native the the U.S. Thrives in full sun in sandy, well-drained soils. No serious pest or disease issues.
This plant is slightly poisonous and its sap is a skin irritant. Toxic to dogs, cats, and horses. But a vital plant for butterfly gardens.
Light: Full Sun
Zone: 9, 10, 11
Origin: Southwestern U.S., Northern Mexico