Quick answer: 7 native plants for wet soil and rain gardens are native to Idaho, 6 with a live listing as of 04 Nov 2026.
7 species
- Broadleaf cattail Typha latifolia · 39 states
- Gray alder Alnus incana · 26 states
- Green ash Fraxinus pennsylvanica · 43 states
- Quaking aspen Populus tremuloides · 39 states
- Rocky Mountain iris Iris missouriensis · 11 states
- Seep monkeyflower Erythranthe guttata · 15 states
- Swamp milkweed Asclepias incarnata · 37 states
Native plants for wet soil and rain gardens in Idaho: what to know
7 of the 79 plants native to Idaho in this directory fit this need: 9% of the state's list, below the 15% share across all species.
Between them they flower from March through October, with the most in bloom in May. Mixing early and late bloomers keeps the planting useful all season.
Many do double duty: 7 are also good for birds, 5 are also good for pollinators, 3 are also shade-tolerant.
7 of them grow in full or partial sun and 3 tolerate shade, so there are options for open beds and woodland edges alike. Sizes run from low plants like Rocky Mountain iris and Seep monkeyflower to trees such as Gray alder and Green ash. For wildlife, 5 support pollinators, 7 provide food or cover for birds and 3 are caterpillar host plants.
6 of the 7 have a seed or plant listing we verified as the wild species.
Good places to start
Verified wild-species listings that take sun and are widely native, so they are forgiving first plants.
- Green ash Fraxinus pennsylvanica · Sun, Part Shade, Shade · blooms Apr-Jun
- Quaking aspen Populus tremuloides · Sun, Part Shade, Shade · blooms Mar-Jun
- Swamp milkweed Asclepias incarnata · Sun, Part Shade · blooms Jun-Oct