Native plants for Washington County, Iowa
161 native plants recorded in Washington County, Iowa
The USDA plant database has 222 plants recorded growing wild in Washington County. 161 of them are native to the lower 48, and 14 are introduced species that this page leaves out.
By type: 103 wildflowers and herbs, 20 grasses and sedges, 4 shrubs, 14 low woody plants, 13 trees, 7 vines. USDA has rated sun, soil and water needs for 66 of them (41%), and only those can be matched to a spot below. Annual ragweed (Ambrosia artemisiifolia), Common yarrow (Achillea millefolium) and 4 more are also recorded as introduced.
What fits each kind of spot in Washington County
| Spot | Rated to fit | Rated not to | Unrated |
|---|---|---|---|
| Sun all day | 66 | 0 | 95 |
| Half shade | 42 | 24 | 95 |
| Under trees | 17 | 49 | 95 |
| Heavy clay | 54 | 12 | 95 |
| Sandy, drains fast | 43 | 23 | 95 |
| Never watered | 21 | 45 | 95 |
| Stays soggy | 33 | 33 | 95 |
Sun all day in Washington County: 66 rated natives
34 wildflowers and herbs, 14 grasses and sedges, 10 trees, 4 low woody plants, 3 shrubs, 1 vines. The first 8, ranked by how easy a start they make:
- Blackeyed Susan (Rudbeckia hirta) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1 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 selfheal (Prunella vulgaris) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1.5 ft mature · rapid 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 - Golden tickseed (Coreopsis tinctoria) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 3 ft mature · rapid growth · perennial - Narrowleaf blue-eyed grass (Sisyrinchium angustifolium) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 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
Half shade in Washington County: 42 rated natives
22 wildflowers and herbs, 9 grasses and sedges, 8 trees, 2 shrubs, 1 low woody plants. The first 8, ranked by how easy a start they make:
- 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 - Prairie fleabane (Erigeron strigosus) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 3 ft mature · moderate 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 - Pinnate prairie coneflower (Ratibida pinnata) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 4 ft mature · moderate growth · perennial · high shade tolerance - Sawtooth sunflower (Helianthus grosseserratus) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 5 ft mature · moderate growth · perennial · high shade tolerance - Common selfheal (Prunella vulgaris) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1.5 ft mature · rapid growth · perennial - Golden tickseed (Coreopsis tinctoria) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 3 ft mature · rapid growth · perennial - Narrowleaf blue-eyed grass (Sisyrinchium angustifolium) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 2 ft mature · moderate growth · perennial
Under trees in Washington County: 17 rated natives
7 wildflowers and herbs, 6 grasses and sedges, 3 trees, 1 low woody plants. The first 8, ranked by how easy a start they make:
- Blackeyed Susan (Rudbeckia hirta) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1 ft mature · rapid growth · perennial - Prairie fleabane (Erigeron strigosus) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 3 ft mature · moderate 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 - Pinnate prairie coneflower (Ratibida pinnata) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 4 ft mature · moderate growth · perennial - Sawtooth sunflower (Helianthus grosseserratus) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 5 ft mature · moderate growth · perennial - Canadian horseweed (Conyza canadensis) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 5 ft mature · rapid growth - Indiangrass (Sorghastrum nutans) grasses and sedges
USDA growing data on file · photo available · about 6 ft mature · moderate growth · perennial - Strawcolored flatsedge (Cyperus strigosus) grasses and sedges
USDA growing data on file · photo available · about 3.2 ft mature · moderate growth · perennial
Heavy clay in Washington County: 54 rated natives
27 wildflowers and herbs, 12 grasses and sedges, 8 trees, 3 shrubs, 3 low woody plants, 1 vines. The first 8, ranked by how easy a start they make:
- Common selfheal (Prunella vulgaris) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1.5 ft mature · rapid 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 - Pennsylvania bittercress (Cardamine pensylvanica) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1.5 ft mature · rapid growth · perennial - Prairie fleabane (Erigeron strigosus) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 3 ft mature · moderate growth · perennial - White meadowsweet (Spiraea alba) shrubs
USDA growing data on file · conspicuous flowers · photo available · about 3 ft mature · moderate growth · perennial - Wild sarsaparilla (Aralia nudicaulis) low woody plants
USDA growing data on file · conspicuous flowers · photo available · about 1.5 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 - Bulbous bittercress (Cardamine bulbosa) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1.4 ft mature · rapid growth · perennial
Sandy, drains fast in Washington County: 43 rated natives
22 wildflowers and herbs, 9 grasses and sedges, 8 trees, 3 low woody plants, 1 shrubs. The first 8, ranked by how easy a start they make:
- Common selfheal (Prunella vulgaris) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1.5 ft mature · rapid 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 - Pennsylvania bittercress (Cardamine pensylvanica) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1.5 ft mature · rapid growth · perennial - Prairie fleabane (Erigeron strigosus) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 3 ft mature · moderate growth · perennial - Pride of Ohio (Dodecatheon meadia) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 2 ft mature · moderate growth · perennial - White meadowsweet (Spiraea alba) shrubs
USDA growing data on file · conspicuous flowers · photo available · about 3 ft mature · moderate growth · perennial - Wild sarsaparilla (Aralia nudicaulis) low woody plants
USDA growing data on file · conspicuous flowers · photo available · about 1.5 ft mature · moderate 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
Never watered in Washington County: 21 rated natives
9 wildflowers and herbs, 4 trees, 3 low woody plants, 3 grasses and sedges, 2 shrubs. The first 8, ranked by how easy a start they make:
- Blackeyed Susan (Rudbeckia hirta) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1 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 - 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 - Prairie fleabane (Erigeron strigosus) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 3 ft mature · moderate growth · perennial - Wild sarsaparilla (Aralia nudicaulis) low woody plants
USDA growing data on file · conspicuous flowers · photo available · about 1.5 ft mature · moderate 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 - Cutleaf coneflower (Rudbeckia laciniata) low woody plants
USDA growing data on file · conspicuous flowers · photo available · about 8.2 ft mature · rapid growth · perennial · high drought tolerance - Pinnate prairie coneflower (Ratibida pinnata) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 4 ft mature · moderate growth · perennial
Stays soggy in Washington County: 33 rated natives
19 wildflowers and herbs, 9 grasses and sedges, 4 trees, 1 shrubs. The first 8, ranked by how easy a start they make:
- 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 - Canada germander (Teucrium canadense) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 3.3 ft mature · moderate growth · perennial · takes saturated soil - Bulbous bittercress (Cardamine bulbosa) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1.4 ft mature · rapid growth · perennial - Golden tickseed (Coreopsis tinctoria) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 3 ft mature · rapid growth · perennial - White meadowsweet (Spiraea alba) shrubs
USDA growing data on file · conspicuous flowers · photo available · about 3 ft mature · moderate 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 - Common buttonbush (Cephalanthus occidentalis) trees
USDA growing data on file · conspicuous flowers · photo available · about 15 ft mature · moderate growth · perennial · takes saturated soil - Jack in the pulpit (Arisaema triphyllum) wildflowers and herbs
USDA growing data on file · conspicuous flowers · photo available · about 1.5 ft mature · moderate growth · perennial · toxicity: slight
Natives Washington County has that most of Iowa does not
23 natives here are on file in no more than 5 of Iowa's 99 counties. A few of them:
- Pride of Ohio (Dodecatheon meadia): only here
- Dwarf St. Johnswort (Hypericum mutilum): only here
- Bluntleaf sandwort (Moehringia lateriflora): only here
- Mexican plum (Prunus mexicana): only here
- Pennsylvania bittercress (Cardamine pensylvanica): 2 counties
- Golden tickseed (Coreopsis tinctoria): 2 counties
- Purple milkwort (Polygala sanguinea): 2 counties
- Swamp dock (Rumex verticillatus): 2 counties
- Wild sarsaparilla (Aralia nudicaulis): 3 counties
- White meadowsweet (Spiraea alba): 3 counties
Where to start in Washington County
If you have only one spot to fill, sun all day is where Washington County gives you the most rated choice (66 plants), and Blackeyed Susan (Rudbeckia hirta) is the easiest start on that list. Under trees is the hard one here: 17 rated plants, so for that spot it is worth asking a local native-plant society about the 95 unrated natives too.