Quick answer: 2 monarch host plants are native to Washington, 2 with a live listing as of 24 Oct 2026.
2 species
- Narrowleaf milkweed Asclepias fascicularis · 6 states
- Showy milkweed Asclepias speciosa · 17 states
Milkweeds and other species recorded as Monarch larval hosts.
Quick answer: 2 monarch host plants are native to Washington, 2 with a live listing as of 24 Oct 2026.