Quick answer: 56 native plants for wet soil and rain gardens are native to Illinois, 47 with a live listing as of 04 Nov 2026.
56 species
- American holly Ilex opaca · 28 states
- Black willow Salix nigra · 24 states
- Bloodroot Sanguinaria canadensis · 34 states
- Blue vervain Verbena hastata · 34 states
- Broadleaf cattail Typha latifolia · 39 states
- Bur oak Quercus macrocarpa · 33 states
- Canadian burnet Sanguisorba canadensis · 20 states
- Cardinal flower Lobelia cardinalis · 41 states
- Cinnamon fern Osmunda cinnamomea · 32 states
- Closed bottle gentian Gentiana andrewsii · 23 states
- Common buttonbush Cephalanthus occidentalis · 29 states
- Common elderberry Sambucus nigra ssp. canadensis · 36 states
- Common hoptree Ptelea trifoliata · 28 states
- Common ninebark Physocarpus opulifolius · 30 states
- Common winterberry Ilex verticillata · 32 states
- Crimson-eyed rose-mallow Hibiscus moscheutos · 28 states
- Cucumbertree Magnolia acuminata · 19 states
- Cup plant Silphium perfoliatum · 27 states
- Eastern bluestar Amsonia tabernaemontana · 18 states
- Eastern cottonwood Populus deltoides · 42 states
- Fall obedient plant Physostegia virginiana · 37 states
- Foxglove beardtongue Penstemon digitalis · 35 states
- Gray alder Alnus incana · 26 states
- Gray birch Betula populifolia · 17 states
- Great blue lobelia Lobelia siphilitica · 36 states
- Green ash Fraxinus pennsylvanica · 43 states
- Groundnut Apios americana · 21 states
- Highbush blueberry Vaccinium corymbosum · 25 states
- Highbush cranberry Viburnum opulus var. americanum · 22 states
- Hollow Joe-pye weed Eutrochium fistulosum · 24 states
- Jack-in-the-pulpit Arisaema triphyllum · 35 states
- Marsh marigold Caltha palustris · 28 states
- Northern spicebush Lindera benzoin · 31 states
- Pin oak Quercus palustris · 27 states
- Prairie cordgrass Spartina pectinata · 25 states
- Prairie ironweed Vernonia fasciculata · 14 states
- Purple meadow-rue Thalictrum dasycarpum · 17 states
- Quaking aspen Populus tremuloides · 39 states
- Royal fern Osmunda regalis var. spectabilis · 30 states
- Scarlet beebalm Monarda didyma · 25 states
- Sensitive fern Onoclea sensibilis · 26 states
- Silver maple Acer saccharinum · 37 states
- Smooth alder Alnus serrulata · 23 states
- Southern arrowwood Viburnum dentatum · 28 states
- Steeplebush Spiraea tomentosa · 22 states
- Swamp milkweed Asclepias incarnata · 37 states
- Swamp rose Rosa palustris · 27 states
- Swamp sunflower Helianthus angustifolius · 21 states
- Tamarack Larix laricina · 17 states
- Virginia chain fern Woodwardia virginica · 24 states
- Virginia iris Iris virginica · 26 states
- Water oak Quercus nigra · 17 states
- White baneberry Actaea pachypoda · 33 states
- White meadowsweet Spiraea alba · 22 states
- White turtlehead Chelone glabra · 22 states
- Witherod viburnum Viburnum nudum var. cassinoides · 24 states
Native plants for wet soil and rain gardens in Illinois: what to know
56 of the 289 plants native to Illinois in this directory fit this need: 19% of the state's list, above the 15% share across all species.
Between them they flower from February through November, with the most in bloom in May. Mixing early and late bloomers keeps the planting useful all season.
Many do double duty: 44 are also shade-tolerant, 44 are also good for birds, 38 are also good for pollinators.
41 of them grow in full or partial sun and 44 tolerate shade, so there are options for open beds and woodland edges alike. Sizes run from low plants like Bloodroot and Eastern bluestar to trees such as American holly and Black willow. For wildlife, 38 support pollinators, 44 provide food or cover for birds and 22 are caterpillar host plants.
47 of the 56 have a seed or plant listing we verified as the wild species. Be careful buying Crimson-eyed rose-mallow, Eastern bluestar: common listings for these are often a bred variety or a different 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
- Eastern cottonwood Populus deltoides · Sun, Part Shade, Shade · blooms Feb-Apr
- Cardinal flower Lobelia cardinalis · Sun, Part Shade, Shade · blooms May-Oct