Native plants for Knox County, Illinois
548 native plants recorded in Knox County, Illinois
The USDA plant database has 831 plants recorded growing wild in Knox County. 548 of them are native to the lower 48, and 118 are introduced species that this page leaves out.
By type: 345 wildflowers and herbs, 85 grasses and sedges, 14 shrubs, 26 low woody plants, 55 trees, 23 vines. USDA has rated sun, soil and water needs for 222 of them (41%), and only those can be matched to a spot below. Annual ragweed (Ambrosia artemisiifolia), Bride's feathers (Aruncus dioicus) and 19 more are also recorded as introduced.
What fits each kind of spot in Knox County
| Spot | Rated to fit | Rated not to | Unrated |
|---|---|---|---|
| Sun all day | 222 | 0 | 326 |
| Half shade | 149 | 73 | 326 |
| Under trees | 82 | 140 | 326 |
| Heavy clay | 158 | 64 | 326 |
| Sandy, drains fast | 134 | 88 | 326 |
| Never watered | 90 | 132 | 326 |
| Stays soggy | 105 | 116 | 327 |
Sun all day in Knox County: 222 rated natives
98 wildflowers and herbs, 49 grasses and sedges, 45 trees, 10 vines, 10 low woody plants, 10 shrubs. The first 8, ranked by how easy a start they make:
- American vetch (Vicia americana) vines
USDA growing data on file · conspicuous flowers · photo available · about 1.3 ft mature · moderate growth · perennial - American water-willow (Justicia americana) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 2.5 ft mature · rapid growth · perennial - Atlantic camas (Camassia scilloides) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 2.5 ft mature · moderate growth · perennial - Blackeyed Susan (Rudbeckia hirta) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1 ft mature · rapid growth · perennial - Bristly buttercup (Ranunculus hispidus) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 2.5 ft mature · rapid growth · perennial - Bulbous bittercress (Cardamine bulbosa) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1.4 ft mature · rapid growth · perennial - Canadian lousewort (Pedicularis canadensis) low woody plants
USDA growing data on file · conspicuous flowers · photo available · about 1.3 ft mature · moderate growth · perennial - Common blue violet (Viola sororia) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 0.3 ft mature · moderate growth · perennial
Half shade in Knox County: 149 rated natives
67 wildflowers and herbs, 31 trees, 31 grasses and sedges, 7 vines, 7 shrubs, 6 low woody plants. The first 8, ranked by how easy a start they make:
- American vetch (Vicia americana) vines
USDA growing data on file · conspicuous flowers · photo available · about 1.3 ft mature · moderate growth · perennial · high shade tolerance - Blackeyed Susan (Rudbeckia hirta) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1 ft mature · rapid growth · perennial · high shade tolerance - Eastern purple coneflower (Echinacea purpurea) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1.2 ft mature · moderate growth · perennial · high shade tolerance - Gray goldenrod (Solidago nemoralis) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 2 ft mature · rapid growth · perennial · high shade tolerance - Pale purple coneflower (Echinacea pallida) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1.2 ft mature · moderate growth · perennial · high shade tolerance - Trumpet creeper (Campsis radicans) vines
USDA growing data on file · conspicuous flowers · photo available · about 2 ft mature · rapid growth · perennial · high shade tolerance - Canada goldenrod (Solidago canadensis) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 3.5 ft mature · rapid growth · perennial · high shade tolerance - Canadian milkvetch (Astragalus canadensis) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 0.5 ft mature · moderate growth · perennial · high shade tolerance · toxicity: slight
Under trees in Knox County: 82 rated natives
33 wildflowers and herbs, 21 trees, 21 grasses and sedges, 3 vines, 2 low woody plants, 2 shrubs. The first 8, ranked by how easy a start they make:
- American vetch (Vicia americana) vines
USDA growing data on file · conspicuous flowers · photo available · about 1.3 ft mature · moderate growth · perennial - Blackeyed Susan (Rudbeckia hirta) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1 ft mature · rapid growth · perennial - Eastern purple coneflower (Echinacea purpurea) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1.2 ft mature · moderate growth · perennial - Gray goldenrod (Solidago nemoralis) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 2 ft mature · rapid growth · perennial - Pale purple coneflower (Echinacea pallida) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1.2 ft mature · moderate growth · perennial - Trumpet creeper (Campsis radicans) vines
USDA growing data on file · conspicuous flowers · photo available · about 2 ft mature · rapid growth · perennial - Canada goldenrod (Solidago canadensis) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 3.5 ft mature · rapid growth · perennial - Canadian milkvetch (Astragalus canadensis) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 0.5 ft mature · moderate growth · perennial · toxicity: slight
Heavy clay in Knox County: 158 rated natives
73 wildflowers and herbs, 38 grasses and sedges, 28 trees, 7 vines, 6 low woody plants, 6 shrubs. The first 8, ranked by how easy a start they make:
- American water-willow (Justicia americana) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 2.5 ft mature · rapid growth · perennial - Common selfheal (Prunella vulgaris) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1.5 ft mature · rapid growth · perennial - Eastern purple coneflower (Echinacea purpurea) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1.2 ft mature · moderate growth · perennial - Fringeleaf wild petunia (Ruellia humilis) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 2.6 ft mature · moderate growth · perennial - Groundnut (Apios americana) vines
USDA growing data on file · conspicuous flowers · photo available · about 1 ft mature · rapid growth · perennial - Marsh hedgenettle (Stachys palustris) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 3 ft mature · moderate growth · perennial - Pale purple coneflower (Echinacea pallida) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1.2 ft mature · moderate growth · perennial - Pennsylvania bittercress (Cardamine pensylvanica) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1.5 ft mature · rapid growth · perennial
Sandy, drains fast in Knox County: 134 rated natives
57 wildflowers and herbs, 34 trees, 26 grasses and sedges, 7 vines, 6 shrubs, 4 low woody plants. The first 8, ranked by how easy a start they make:
- American vetch (Vicia americana) vines
USDA growing data on file · conspicuous flowers · photo available · about 1.3 ft mature · moderate growth · perennial - American water-willow (Justicia americana) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 2.5 ft mature · rapid growth · perennial - Common selfheal (Prunella vulgaris) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1.5 ft mature · rapid growth · perennial - Eastern purple coneflower (Echinacea purpurea) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1.2 ft mature · moderate growth · perennial - Fringeleaf wild petunia (Ruellia humilis) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 2.6 ft mature · moderate growth · perennial - Gray goldenrod (Solidago nemoralis) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 2 ft mature · rapid growth · perennial - Groundnut (Apios americana) vines
USDA growing data on file · conspicuous flowers · photo available · about 1 ft mature · rapid growth · perennial - Marsh hedgenettle (Stachys palustris) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 3 ft mature · moderate growth · perennial
Never watered in Knox County: 90 rated natives
29 wildflowers and herbs, 27 trees, 14 grasses and sedges, 7 low woody plants, 7 shrubs, 6 vines. The first 8, ranked by how easy a start they make:
- American vetch (Vicia americana) vines
USDA growing data on file · conspicuous flowers · photo available · about 1.3 ft mature · moderate growth · perennial · high drought tolerance - Missouri goldenrod (Solidago missouriensis) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 3 ft mature · moderate growth · perennial · high drought tolerance - Trumpet creeper (Campsis radicans) vines
USDA growing data on file · conspicuous flowers · photo available · about 2 ft mature · rapid growth · perennial · high drought tolerance - Allegheny blackberry (Rubus allegheniensis) low woody plants
USDA growing data on file · conspicuous flowers · photo available · about 6 ft mature · rapid growth · perennial · high drought tolerance - Carolina rose (Rosa carolina) low woody plants
USDA growing data on file · conspicuous flowers · photo available · about 5 ft mature · moderate growth · perennial · high drought tolerance - Foxglove beardtongue (Penstemon digitalis) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 4 ft mature · moderate growth · perennial · high drought tolerance - Leadplant (Amorpha canescens) shrubs
USDA growing data on file · conspicuous flowers · photo available · about 4 ft mature · moderate growth · perennial · high drought tolerance - Blackeyed Susan (Rudbeckia hirta) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1 ft mature · rapid growth · perennial
Stays soggy in Knox County: 105 rated natives
50 wildflowers and herbs, 34 grasses and sedges, 13 trees, 3 vines, 3 shrubs, 2 low woody plants. The first 8, ranked by how easy a start they make:
- American water plantain (Alisma subcordatum) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 0.5 ft mature · moderate growth · perennial · takes saturated soil - American water-willow (Justicia americana) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 2.5 ft mature · rapid growth · perennial · takes saturated soil - Bluntleaf bedstraw (Galium obtusum) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1.5 ft mature · moderate growth · perennial · takes saturated soil - Cursed buttercup (Ranunculus sceleratus) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 2 ft mature · rapid growth · perennial · takes saturated soil - Groundnut (Apios americana) vines
USDA growing data on file · conspicuous flowers · photo available · about 1 ft mature · rapid growth · perennial · takes saturated soil - Marsh hedgenettle (Stachys palustris) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 3 ft mature · moderate growth · perennial · takes saturated soil - Smooth phlox (Phlox glaberrima) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 3 ft mature · moderate growth · perennial · takes saturated soil - American licorice (Glycyrrhiza lepidota) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 4 ft mature · moderate growth · perennial · takes saturated soil
Natives Knox County has that most of Illinois does not
2 natives here are on file in no more than 5 of Illinois's 102 counties. A few of them:
- Swollen duckweed (Lemna gibba): 3 counties
- Early wildrye (Elymus macgregorii): 5 counties
Where to start in Knox County
If you have only one spot to fill, sun all day is where Knox County gives you the most rated choice (222 plants), and American vetch (Vicia americana) is the easiest start on that list. Under trees is the hard one here: 82 rated plants, so for that spot it is worth asking a local native-plant society about the 326 unrated natives too.