Quick answer: 7 native plants for wet soil and rain gardens are native to Washington, 4 with a live listing as of 16 Sep 2026.
7 species
- Bog Labrador tea Ledum groenlandicum · 4 states
- Bog laurel Kalmia polifolia · 5 states
- Broadleaf cattail Typha latifolia · 11 states
- Marsh marigold Caltha palustris · 8 states
- Pacific trillium Trillium ovatum · 3 states
- Quaking aspen Populus tremuloides · 24 states
- Rocky Mountain iris Iris missouriensis · 7 states