Native plants · Ohio

Native plants of Knox County

622 plant species are recorded as native to Ohio in Kew’s World Checklist of Vascular Plants and USDA PLANTS, and recorded in Knox County by USDA PLANTS. 280 of them have growing records you can filter by light, moisture, height and estimated cold hardiness. 3 more species are listed as both native and introduced and kept in a separate section.

County summary · USDA PLANTS and Kew WCVP

Knox County, Ohio

Native species: 622 Typical Ohio county: 559 (median of 88 counties)
Garden-ready natives: 280 Typical Ohio county: 241
Share by type (all 622 native species): Percent of the 622 native species in each growth type

Tree 14% (86)
Shrub 6% (35)
Wildflower (forb) 59% (367)
Grass or grass-like 12% (77)
Vine 4% (27)
Fern 5% (30)

Wildflowers make up the largest share of the native list (59%), followed by trees (14%).

Recorded native ranges can include long-established populations that spread from gardens; check your state’s native plant society list for local guidance. How native status is decided.

ZIP codes mainly in this county fall in USDA hardiness zone 6a (2023 map).

The native plant list

Garden-ready natives 280

Native species with PLANTS growing records (height, light, moisture, minimum temperature). “—” means PLANTS has no value.

Garden-ready native plants of Knox County, Ohio
Plant	Type	Height	Light	Water use	Hardy to
Allegheny blackberry Rubus allegheniensis	Shrub	6 ft	Shade-tolerant	Medium	Zone 4b
Allegheny serviceberry Amelanchier laevis	Tree	35 ft	Shade-tolerant	Medium	Zone 3b
alternateleaf dogwood Cornus alternifolia	Tree	25 ft	Shade-tolerant	Medium	Zone 2b
American basswood Tilia americana	Tree	100 ft	Shade-tolerant	Medium	Zone 2b
American beech Fagus grandifolia	Tree	80 ft	Shade-tolerant	Medium	Zone 3a
American bellflower Campanulastrum americanum	Wildflower (forb)	6 ft	Shade-tolerant	Medium	Zone 12b
American bittersweet Celastrus scandens	Vine	15 ft	Shade-tolerant	High	Zone 3b
American black currant Ribes americanum	Shrub	3 ft	—	—	Zone 2b
American chestnut Castanea dentata	Tree	115 ft	Sun	Medium	Zone 4a
American elm Ulmus americana	Tree	120 ft	Sun–part shade	High	Zone 2b
American hazelnut Corylus americana	Shrub	10 ft	Sun–part shade	Medium	Zone 4a
American hornbeam Carpinus caroliniana	Tree	30 ft	Shade-tolerant	Medium	Zone 4a
American plum Prunus americana	Tree	24 ft	Sun	Medium	Zone 3b
American pokeweed Phytolacca americana	Wildflower (forb)	7.3 ft	Shade-tolerant	Medium	Zone 4a
American speedwell Veronica americana	Wildflower (forb)	10 in	Shade-tolerant	High	Zone 3b
American sycamore Platanus occidentalis	Tree	100 ft	Sun–part shade	High	Zone 4a
American water horehound Lycopus americanus	Wildflower (forb)	1.8 ft	Shade-tolerant	High	Zone 3b
American water plantain Alisma subcordatum	Wildflower (forb)	6 in	Sun	High	Zone 4a
American water-willow Justicia americana	Wildflower (forb)	2.5 ft	Shade-tolerant	Medium	Zone 4b
American witchhazel Hamamelis virginiana	Tree	20 ft	Sun–part shade	Medium	Zone 4b
arrowleaf tearthumb Polygonum sagittatum	Vine	1 ft	Sun	Medium	Zone 6a
awlfruit sedge Carex stipata	Grass or grass-like	3.5 ft	Shade-tolerant	Medium	Zone 3b
beaked agrimony Agrimonia rostellata	Wildflower (forb)	2.3 ft	Sun–part shade	Medium	Zone 4a
big bluestem Andropogon gerardii	Grass or grass-like	6 ft	Sun	Low	Zone 2b
bigleaf aster Eurybia macrophylla	Wildflower (forb)	4.6 ft	Shade-tolerant	Medium	Zone 4b
bigtooth aspen Populus grandidentata	Tree	65 ft	Sun	High	Zone 3a
bitternut hickory Carya cordiformis	Tree	75 ft	Sun	Medium	Zone 2b
black ash Fraxinus nigra	Tree	65 ft	Sun	High	Zone 2b
black cherry Prunus serotina	Tree	80 ft	Sun	Medium	Zone 4a
black huckleberry Gaylussacia baccata	Shrub	4 ft	Shade-tolerant	Low	Zone 4a
black maple Acer nigrum	Tree	100 ft	Shade-tolerant	Medium	Zone 2b
black oak Quercus velutina	Tree	80 ft	Sun–part shade	Medium	Zone 4a
black raspberry Rubus occidentalis	Shrub	6 ft	Sun–part shade	Medium	Zone 4b
black walnut Juglans nigra	Tree	100 ft	Sun	High	Zone 4b
black willow Salix nigra	Tree	100 ft	Sun	High	Zone 1b
blackeyed Susan Rudbeckia hirta	Wildflower (forb)	1 ft	Sun	Medium	Zone 5a
blackgum Nyssa sylvatica	Tree	95 ft	Shade-tolerant	Medium	Zone 5b
blackhaw Viburnum prunifolium	Tree	16 ft	Shade-tolerant	Medium	Zone 4a
blue cohosh Caulophyllum thalictroides	Wildflower (forb)	2.5 ft	Shade-tolerant	Medium	Zone 4a
blunt broom sedge Carex tribuloides	Grass or grass-like	3 ft	Shade-tolerant	Medium	Zone 4b
blunt spikerush Eleocharis obtusa	Grass or grass-like	1.6 ft	Sun	Medium	Zone 11a
bluntleaf bedstraw Galium obtusum	Wildflower (forb)	1.5 ft	Shade-tolerant	High	Zone 4a
bog willowherb Epilobium leptophyllum	Wildflower (forb)	3.6 ft	Sun–part shade	High	Zone 4a
boxelder Acer negundo	Tree	60 ft	Shade-tolerant	Medium	Zone 2b
bristly buttercup Ranunculus hispidus	Wildflower (forb)	2.5 ft	Shade-tolerant	Medium	Zone 4a
broadfruit bur-reed Sparganium eurycarpum	Wildflower (forb)	4.9 ft	Sun–part shade	High	Zone 4a
broadleaf arrowhead Sagittaria latifolia	Wildflower (forb)	4.9 ft	Sun	High	Zone 4a
broadleaf cattail Typha latifolia	Wildflower (forb)	5 ft	Sun–part shade	High	Zone 3b
broom sedge Carex scoparia	Grass or grass-like	2.5 ft	Shade-tolerant	High	Zone 3b
broomsedge bluestem Andropogon virginicus	Grass or grass-like	3 ft	Sun	Medium	Zone 5b
bulbous bittercress Cardamine bulbosa	Wildflower (forb)	1.4 ft	Shade-tolerant	Medium	Zone 4a
bur oak Quercus macrocarpa	Tree	100 ft	Sun–part shade	Medium	Zone 3b
burningbush Euonymus atropurpureus	Tree	10 ft	Shade-tolerant	Low	—
butterfly milkweed Asclepias tuberosa	Wildflower (forb)	2 ft	Sun	Low	Zone 4a
butternut Juglans cinerea	Tree	80 ft	Sun	Medium	Zone 4a
calico aster Symphyotrichum lateriflorum	Wildflower (forb)	4 ft	Sun	Medium	Zone 4a
Canada germander Teucrium canadense	Wildflower (forb)	3.3 ft	Sun–part shade	High	Zone 3a
Canada goldenrod Solidago canadensis	Wildflower (forb)	3.5 ft	Sun	Medium	Zone 3a
Canadian horseweed Conyza canadensis	Wildflower (forb)	5 ft	Sun	Medium	Zone 12b
Canadian lousewort Pedicularis canadensis	Wildflower (forb)	1.3 ft	Shade-tolerant	Medium	Zone 3a
cardinalflower Lobelia cardinalis	Wildflower (forb)	5.9 ft	Shade-tolerant	Low	Zone 4a
Carolina rose Rosa carolina	Shrub	5 ft	Sun–part shade	Low	Zone 3a
cat greenbrier Smilax glauca	Vine	1 ft	Shade-tolerant	Medium	Zone 6a
chestnut oak Quercus montana	Tree	73 ft	Sun–part shade	Medium	Zone 4a
chinquapin oak Quercus muehlenbergii	Tree	70 ft	Sun	Medium	Zone 4a
chokecherry Prunus virginiana	Tree	25 ft	Sun	Medium	Zone 3a
cinnamon fern Osmunda cinnamomea	Fern	4.9 ft	Shade-tolerant	Medium	Zone 4a
climbing rose Rosa setigera	Vine	16 ft	Sun	Low	Zone 6a
closed bottle gentian Gentiana andrewsii	Wildflower (forb)	2 ft	Sun–part shade	Medium	Zone 3b
common blue violet Viola sororia	Wildflower (forb)	4 in	Sun–part shade	High	Zone 4b
common blue wood aster Symphyotrichum cordifolium	Wildflower (forb)	5 ft	Sun	Low	Zone 3b
common cowparsnip Heracleum maximum	Wildflower (forb)	8 ft	Sun	High	Zone 3b
common evening primrose Oenothera biennis	Wildflower (forb)	5 ft	Sun	Medium	Zone 4b
common goldstar Hypoxis hirsuta	Wildflower (forb)	10 in	Sun–part shade	Medium	Zone 4a
common hackberry Celtis occidentalis	Tree	60 ft	Shade-tolerant	Low	Zone 2b
common hoptree Ptelea trifoliata	Tree	25 ft	Sun–part shade	High	Zone 4a
common ninebark Physocarpus opulifolius	Shrub	10 ft	Sun	Low	Zone 4a
common rush Juncus effusus	Grass or grass-like	6.6 ft	Sun	Medium	Zone 3b
common selfheal Prunella vulgaris	Wildflower (forb)	1.5 ft	Sun–part shade	Medium	Zone 3b
common serviceberry Amelanchier arborea	Tree	36 ft	Shade-tolerant	Medium	Zone 2b
common sneezeweed Helenium autumnale	Wildflower (forb)	4.9 ft	Sun	Medium	Zone 3a
common snowberry Symphoricarpos albus	Shrub	3 ft	Sun	Medium	Zone 3b
common winterberry Ilex verticillata	Tree	10 ft	Sun–part shade	High	Zone 4b
composite dropseed Sporobolus compositus	Grass or grass-like	3 ft	Sun	Low	Zone 3b
coon's tail Ceratophyllum demersum	Wildflower (forb)	—	Sun–part shade	High	Zone 3b
coralberry Symphoricarpos orbiculatus	Shrub	2 ft	Sun–part shade	High	Zone 5a
crested sedge Carex cristatella	Grass or grass-like	3 ft	Shade-tolerant	High	Zone 4a
crookedstem aster Symphyotrichum prenanthoides	Wildflower (forb)	4 ft	Sun	Medium	Zone 3b
cucumber tree Magnolia acuminata	Tree	100 ft	Sun–part shade	High	Zone 5b
cup plant Silphium perfoliatum	Wildflower (forb)	6 ft	Sun–part shade	—	Zone 2b
cutleaf coneflower Rudbeckia laciniata	Wildflower (forb)	8.2 ft	Shade-tolerant	Low	Zone 3b
deertongue Dichanthelium clandestinum	Grass or grass-like	2 ft	Sun	Low	Zone 4a
devil's beggartick Bidens frondosa	Wildflower (forb)	4 ft	Sun–part shade	Medium	Zone 12a
devil's darning needles Clematis virginiana	Vine	15 ft	Sun–part shade	Medium	Zone 3b
ditch stonecrop Penthorum sedoides	Wildflower (forb)	2.6 ft	Sun–part shade	Medium	Zone 4b
dotted smartweed Polygonum punctatum	Wildflower (forb)	3.2 ft	Sun	Medium	Zone 10b
downy yellow violet Viola pubescens	Wildflower (forb)	1.3 ft	Shade-tolerant	Medium	Zone 4a
dwarf St. Johnswort Hypericum mutilum	Wildflower (forb)	2.6 ft	Sun–part shade	Medium	Zone 5a
eastern cottonwood Populus deltoides	Tree	190 ft	Sun	High	Zone 3a
eastern redbud Cercis canadensis	Tree	30 ft	Shade-tolerant	Low	Zone 4b
eastern teaberry Gaultheria procumbens	Shrub	6 in	Shade-tolerant	Low	Zone 4a
fall panicgrass Panicum dichotomiflorum	Grass or grass-like	3.3 ft	Sun	High	Zone 3a
field horsetail Equisetum arvense	Fern	11 in	Sun–part shade	High	Zone 3a
flowering dogwood Cornus florida	Tree	30 ft	Shade-tolerant	Low	Zone 4b
fowl mannagrass Glyceria striata	Grass or grass-like	5.7 ft	Shade-tolerant	Medium	Zone 3b
fox sedge Carex vulpinoidea	Grass or grass-like	3.2 ft	Sun–part shade	Medium	Zone 3b
foxglove beardtongue Penstemon digitalis	Wildflower (forb)	4 ft	Shade-tolerant	Low	Zone 3b
Frank's sedge Carex frankii	Grass or grass-like	2 ft	Shade-tolerant	High	Zone 5a
fringed sedge Carex crinita	Grass or grass-like	5.2 ft	Sun–part shade	Medium	Zone 4a
frost grape Vitis vulpina	Vine	83 ft	Sun–part shade	Medium	Zone 5a
Georgia bulrush Scirpus georgianus	Grass or grass-like	4.5 ft	Sun–part shade	Medium	Zone 3b
giant goldenrod Solidago gigantea	Wildflower (forb)	8.2 ft	Sun–part shade	Medium	Zone 4a
golden ragwort Packera aurea	Wildflower (forb)	3.9 ft	Shade-tolerant	High	Zone 3a
graceful sedge Carex gracillima	Grass or grass-like	3 ft	Shade-tolerant	Medium	Zone 4a
gray alder Alnus incana	Tree	25 ft	Sun–part shade	High	Zone 4a
gray dogwood Cornus racemosa	Shrub	10 ft	Shade-tolerant	Medium	Zone 2b
gray goldenrod Solidago nemoralis	Wildflower (forb)	2 ft	Sun	Medium	Zone 4a
Gray's sedge Carex grayi	Grass or grass-like	3 ft	Shade-tolerant	High	Zone 4a
great St. Johnswort Hypericum ascyron	Wildflower (forb)	5 ft	Sun	Medium	Zone 5a
green ash Fraxinus pennsylvanica	Tree	80 ft	Shade-tolerant	Medium	Zone 2b
groundnut Apios americana	Vine	1 ft	Shade-tolerant	Medium	Zone 5a
hairy lespedeza Lespedeza hirta	Wildflower (forb)	6 ft	Sun	Low	Zone 6a
hairy white oldfield aster Symphyotrichum pilosum	Wildflower (forb)	3 ft	Shade-tolerant	Medium	Zone 4a
harvestlice Agrimonia parviflora	Wildflower (forb)	6 ft	Sun–part shade	High	Zone 4a
hazel alder Alnus serrulata	Tree	30 ft	Sun	High	Zone 5a
highbush blueberry Vaccinium corymbosum	Shrub	12 ft	Shade-tolerant	Medium	Zone 4a
honeylocust Gleditsia triacanthos	Tree	70 ft	Sun	Medium	Zone 3b
hophornbeam Ostrya virginiana	Tree	45 ft	Shade-tolerant	Low	Zone 3b
Indiangrass Sorghastrum nutans	Grass or grass-like	6 ft	Sun	Medium	Zone 3b
Indianhemp Apocynum cannabinum	Wildflower (forb)	3.3 ft	Sun–part shade	High	Zone 3a
interrupted fern Osmunda claytoniana	Fern	4 ft	Shade-tolerant	High	Zone 3b
Jack in the pulpit Arisaema triphyllum	Wildflower (forb)	1.5 ft	Shade-tolerant	High	Zone 5b
Jerusalem artichoke Helianthus tuberosus	Wildflower (forb)	9.8 ft	Sun–part shade	Low	Zone 3a
jewelweed Impatiens capensis	Wildflower (forb)	4.9 ft	Shade-tolerant	Medium	Zone 10b
Kentucky coffeetree Gymnocladus dioicus	Tree	100 ft	Sun	Medium	Zone 4a
lanceleaf tickseed Coreopsis lanceolata	Wildflower (forb)	2 ft	Sun	Medium	Zone 6b
lesser bladderwort Utricularia minor	Wildflower (forb)	2 in	Sun	High	Zone 3a
limestone bittercress Cardamine douglassii	Wildflower (forb)	1 ft	Shade-tolerant	High	Zone 4a
limestone meadow sedge Carex granularis	Grass or grass-like	2.5 ft	Shade-tolerant	High	Zone 4a
little bluestem Schizachyrium scoparium	Grass or grass-like	3 ft	Sun	Low	Zone 3b
littleleaf buttercup Ranunculus abortivus	Wildflower (forb)	2.8 ft	Shade-tolerant	Medium	Zone 3a
longleaf starwort Stellaria longifolia	Wildflower (forb)	1.5 ft	Shade-tolerant	High	Zone 3b
lowbush blueberry Vaccinium angustifolium	Shrub	2 ft	Sun	Medium	Zone 4a
mapleleaf viburnum Viburnum acerifolium	Shrub	6 ft	Shade-tolerant	Medium	Zone 4b
marsh bellflower Campanula aparinoides	Wildflower (forb)	2 ft	Sun	High	Zone 3b
marsh seedbox Ludwigia palustris	Wildflower (forb)	2 in	Sun	High	Zone 4a
Missouri River willow Salix eriocephala	Tree	52 ft	Shade-tolerant	High	Zone 3b
mockernut hickory Carya tomentosa	Tree	85 ft	Sun–part shade	Medium	Zone 4a
moss phlox Phlox subulata	Wildflower (forb)	6 in	Sun–part shade	High	Zone 4b
mountain laurel Kalmia latifolia	Tree	6 ft	Shade-tolerant	Low	Zone 5a
mountain maple Acer spicatum	Tree	25 ft	Shade-tolerant	Medium	Zone 2b
nannyberry Viburnum lentago	Tree	28 ft	Shade-tolerant	Medium	Zone 4a
narrowleaf blue-eyed grass Sisyrinchium angustifolium	Wildflower (forb)	2 ft	Sun–part shade	Medium	Zone 7a
New Jersey tea Ceanothus americanus	Shrub	3 ft	Shade-tolerant	Low	Zone 4b
nimblewill Muhlenbergia schreberi	Grass or grass-like	3.2 ft	Shade-tolerant	Low	Zone 4a
nodding beggartick Bidens cernua	Wildflower (forb)	3.2 ft	Sun–part shade	High	Zone 12a
nodding fescue Festuca subverticillata	Grass or grass-like	3 ft	Sun–part shade	Medium	Zone 3a
nodding lady's tresses Spiranthes cernua	Wildflower (forb)	1.5 ft	Sun	High	Zone 3b
northern bush honeysuckle Diervilla lonicera	Shrub	2.4 ft	Sun–part shade	Low	Zone 5a
northern catalpa Catalpa speciosa	Tree	60 ft	Sun	Low	Zone 3b
northern maidenhair Adiantum pedatum	Fern	1.3 ft	Shade-tolerant	Medium	Zone 3b
northern red oak Quercus rubra	Tree	81 ft	Sun–part shade	Medium	Zone 3b
northern spicebush Lindera benzoin	Tree	12 ft	Sun–part shade	Medium	Zone 5a
Ohio buckeye Aesculus glabra	Tree	68 ft	Shade-tolerant	Medium	Zone 4a
oval-leaf sedge Carex cephalophora	Grass or grass-like	2.6 ft	Sun–part shade	Low	Zone 4a
pale touch-me-not Impatiens pallida	Wildflower (forb)	8.2 ft	Shade-tolerant	Medium	Zone 10b
panicledleaf ticktrefoil Desmodium paniculatum	Wildflower (forb)	3 ft	Sun–part shade	Low	Zone 6a
pawpaw Asimina triloba	Tree	25 ft	Shade-tolerant	Medium	Zone 4b
Pennsylvania bittercress Cardamine pensylvanica	Wildflower (forb)	1.5 ft	Shade-tolerant	Medium	Zone 4a
Pennsylvania buttercup Ranunculus pensylvanicus	Wildflower (forb)	3.9 ft	Shade-tolerant	High	Zone 4b
Pennsylvania smartweed Polygonum pensylvanicum	Wildflower (forb)	3.9 ft	Sun	Medium	Zone 10b
Philadelphia fleabane Erigeron philadelphicus	Wildflower (forb)	2.8 ft	Sun–part shade	Medium	Zone 4b
pignut hickory Carya glabra	Tree	80 ft	Sun–part shade	Medium	Zone 4a
pin oak Quercus palustris	Tree	100 ft	Sun	High	Zone 4a
pinnate prairie coneflower Ratibida pinnata	Wildflower (forb)	4 ft	Sun	Medium	Zone 3b
pipsissewa Chimaphila umbellata	Shrub	1.5 ft	Shade-tolerant	Low	Zone 3b
prairie fleabane Erigeron strigosus	Wildflower (forb)	3 ft	Sun	Medium	Zone 4b
prairie willow Salix humilis	Shrub	10 ft	Sun–part shade	High	Zone 3a
purple lovegrass Eragrostis spectabilis	Grass or grass-like	11 in	Sun	Low	Zone 3a
purpleflowering raspberry Rubus odoratus	Shrub	5 ft	Sun–part shade	Medium	Zone 3b
purpleleaf willowherb Epilobium coloratum	Wildflower (forb)	3.3 ft	Sun–part shade	High	Zone 4a
purplestem aster Symphyotrichum puniceum	Wildflower (forb)	8.1 ft	Sun	High	Zone 3b
purpletop tridens Tridens flavus	Grass or grass-like	2.5 ft	Sun	Low	Zone 5a
pussy willow Salix discolor	Tree	40 ft	Shade-tolerant	High	Zone 4a
quaking aspen Populus tremuloides	Tree	65 ft	Sun	High	Zone 1a
rattlesnake fern Botrychium virginianum	Fern	1.4 ft	Shade-tolerant	Medium	Zone 3b
red elderberry Sambucus racemosa	Tree	18 ft	Sun–part shade	High	Zone 4a
red maple Acer rubrum	Tree	68 ft	Sun–part shade	High	Zone 2b
red mulberry Morus rubra	Tree	70 ft	Shade-tolerant	Medium	Zone 4a
reed canarygrass Phalaris arundinacea	Grass or grass-like	5 ft	Sun	High	Zone 3b
rice cutgrass Leersia oryzoides	Grass or grass-like	4.9 ft	Sun	High	Zone 4a
riverbank grape Vitis riparia	Vine	45 ft	Sun–part shade	Medium	Zone 4a
riverbank wildrye Elymus riparius	Grass or grass-like	4.5 ft	Shade-tolerant	High	Zone 4a
rough avens Geum laciniatum	Wildflower (forb)	3.1 ft	Sun–part shade	Medium	Zone 5a
rough bedstraw Galium asprellum	Wildflower (forb)	5.9 ft	Shade-tolerant	Medium	Zone 4a
rough bentgrass Agrostis scabra	Grass or grass-like	2.5 ft	Sun	Medium	Zone 3b
roughfruit amaranth Amaranthus tuberculatus	Wildflower (forb)	6.6 ft	Sun	High	Zone 4a
roughleaf dogwood Cornus drummondii	Tree	20 ft	Sun–part shade	Low	Zone 4b
roundleaf goldenrod Solidago patula	Wildflower (forb)	6.6 ft	Sun–part shade	High	Zone 3a
roundleaf greenbrier Smilax rotundifolia	Vine	1 ft	Sun	Medium	Zone 4a
rufous bulrush Scirpus pendulus	Grass or grass-like	4 ft	Sun	Medium	Zone 3b
sandbar willow Salix interior	Tree	30 ft	Sun	—	Zone 1a
sassafras Sassafras albidum	Tree	75 ft	Sun	Low	Zone 4b
sawtooth sunflower Helianthus grosseserratus	Wildflower (forb)	5 ft	Sun	Medium	Zone 3a
scarlet Indian paintbrush Castilleja coccinea	Wildflower (forb)	1.6 ft	Shade-tolerant	Medium	Zone 4b
scarlet oak Quercus coccinea	Tree	70 ft	Sun	Medium	Zone 4b
shagbark hickory Carya ovata	Tree	75 ft	Sun–part shade	Medium	Zone 3a
shallow sedge Carex lurida	Grass or grass-like	3.2 ft	Sun–part shade	Medium	Zone 4a
sharpwing monkeyflower Mimulus alatus	Wildflower (forb)	2.3 ft	Shade-tolerant	High	Zone 5a
shingle oak Quercus imbricaria	Tree	45 ft	Sun	Medium	Zone 5b
shining willow Salix lucida	Tree	13 ft	Sun–part shade	High	Zone 3a
shortawn foxtail Alopecurus aequalis	Grass or grass-like	2.5 ft	Sun–part shade	High	Zone 3b
shrubby St. Johnswort Hypericum prolificum	Shrub	3.2 ft	Sun–part shade	High	Zone 4b
silky dogwood Cornus amomum	Shrub	10 ft	Sun–part shade	High	Zone 3b
silky willow Salix sericea	Tree	12 ft	Sun–part shade	High	Zone 4b
silver maple Acer saccharinum	Tree	90 ft	Sun–part shade	Medium	Zone 2b
skunk cabbage Symplocarpus foetidus	Wildflower (forb)	2 ft	Shade-tolerant	High	Zone 4a
slippery elm Ulmus rubra	Tree	85 ft	Shade-tolerant	High	Zone 3a
small beggarticks Bidens discoidea	Wildflower (forb)	5.2 ft	Sun–part shade	High	Zone 12b
small enchanter's nightshade Circaea alpina	Wildflower (forb)	11 in	Shade-tolerant	Medium	Zone 3b
smallspike false nettle Boehmeria cylindrica	Wildflower (forb)	3.9 ft	Shade-tolerant	Medium	Zone 4a
smooth blue aster Symphyotrichum laeve	Wildflower (forb)	4 ft	Sun	Medium	Zone 3a
smooth hedgenettle Stachys tenuifolia	Wildflower (forb)	25 ft	Shade-tolerant	High	Zone 4a
smooth horsetail Equisetum laevigatum	Fern	5 ft	Sun	Low	Zone 3b
smooth sumac Rhus glabra	Tree	12 ft	Sun	Low	Zone 4a
softstem bulrush Schoenoplectus tabernaemontani	Grass or grass-like	9 ft	Sun	High	Zone 3b
southern arrowwood Viburnum dentatum	Tree	8 ft	Sun–part shade	—	Zone 5a
spotted joe pye weed Eutrochium maculatum	Wildflower (forb)	6 ft	Sun–part shade	High	Zone 4b
spotted St. Johnswort Hypericum punctatum	Wildflower (forb)	3 ft	Shade-tolerant	Medium	Zone 4a
spring avens Geum vernum	Wildflower (forb)	1.6 ft	Shade-tolerant	Medium	Zone 5b
squarrose sedge Carex squarrosa	Grass or grass-like	3 ft	Shade-tolerant	Medium	Zone 4b
staghorn sumac Rhus typhina	Tree	30 ft	Sun–part shade	Low	Zone 4a
steeplebush Spiraea tomentosa	Shrub	4 ft	Sun	Low	Zone 4a
stiff marsh bedstraw Galium tinctorium	Wildflower (forb)	10 in	Shade-tolerant	High	Zone 4a
strawcolored flatsedge Cyperus strigosus	Grass or grass-like	3.2 ft	Sun	Medium	Zone 4a
sugar maple Acer saccharum	Tree	100 ft	Shade-tolerant	Medium	Zone 2b
summer grape Vitis aestivalis	Vine	30 ft	Shade-tolerant	Medium	Zone 5a
swamp cottonwood Populus heterophylla	Tree	100 ft	Sun	High	Zone 5a
swamp milkweed Asclepias incarnata	Wildflower (forb)	4.9 ft	Sun	High	Zone 3b
swamp rose Rosa palustris	Shrub	8.2 ft	Shade-tolerant	Medium	Zone 4a
swamp smartweed Polygonum hydropiperoides	Wildflower (forb)	—	Sun	Medium	Zone 10b
swamp white oak Quercus bicolor	Tree	100 ft	Sun–part shade	High	Zone 4b
sweet fern Comptonia peregrina	Shrub	2 ft	Sun–part shade	Low	Zone 3b
sweet woodreed Cinna arundinacea	Grass or grass-like	4.9 ft	Shade-tolerant	Low	Zone 4a
sweetflag Acorus americanus	Wildflower (forb)	3.9 ft	Sun	High	Zone 3b
switchgrass Panicum virgatum	Grass or grass-like	5 ft	Sun	Medium	Zone 3a
tall hairy agrimony Agrimonia gryposepala	Wildflower (forb)	5.9 ft	Sun–part shade	Medium	Zone 3a
threelobe beggarticks Bidens tripartita	Wildflower (forb)	3.5 ft	Sun–part shade	High	Zone 12a
Torrey's rush Juncus torreyi	Grass or grass-like	3.1 ft	Sun	Medium	Zone 3b
trumpet creeper Campsis radicans	Vine	2 ft	Sun	Low	Zone 6a
trumpetweed Eutrochium fistulosum	Wildflower (forb)	6 ft	Sun–part shade	High	Zone 4b
tuliptree Liriodendron tulipifera	Tree	120 ft	Sun	Medium	Zone 5b
twisted sedge Carex torta	Grass or grass-like	2.8 ft	Shade-tolerant	Medium	Zone 4a
upland bentgrass Agrostis perennans	Grass or grass-like	3.5 ft	Sun–part shade	High	Zone 4a
Virginia bluebells Mertensia virginica	Wildflower (forb)	2.3 ft	Shade-tolerant	High	Zone 4b
Virginia creeper Parthenocissus quinquefolia	Vine	1 ft	Sun–part shade	Low	Zone 4b
Virginia threeseed mercury Acalypha virginica	Wildflower (forb)	3 ft	Sun–part shade	Medium	Zone 10b
Virginia water horehound Lycopus virginicus	Wildflower (forb)	4 ft	Shade-tolerant	High	Zone 4a
Virginia wildrye Elymus virginicus	Grass or grass-like	2.5 ft	Shade-tolerant	Medium	Zone 4b
water knotweed Polygonum amphibium	Wildflower (forb)	1 in	Sun	High	Zone 5a
western snowberry Symphoricarpos occidentalis	Shrub	3 ft	Sun–part shade	Low	Zone 3b
white ash Fraxinus americana	Tree	90 ft	Sun	High	Zone 4a
white avens Geum canadense	Wildflower (forb)	3.9 ft	Shade-tolerant	Medium	Zone 4a
white meadowsweet Spiraea alba	Shrub	3 ft	Sun–part shade	Medium	Zone 4a
white oak Quercus alba	Tree	100 ft	Sun–part shade	Medium	Zone 3a
white panicle aster Symphyotrichum lanceolatum	Wildflower (forb)	6 ft	Sun–part shade	High	Zone 3b
whitegrass Leersia virginica	Grass or grass-like	3.9 ft	Shade-tolerant	Medium	Zone 3a
wild bergamot Monarda fistulosa	Wildflower (forb)	4.9 ft	Sun–part shade	High	Zone 4a
wild blue phlox Phlox divaricata	Wildflower (forb)	3 ft	Sun–part shade	Medium	Zone 4a
wild sarsaparilla Aralia nudicaulis	Wildflower (forb)	1.5 ft	Shade-tolerant	Medium	Zone 3b
wild sweetwilliam Phlox maculata	Wildflower (forb)	2 ft	Sun	Medium	Zone 5b
winged sumac Rhus copallinum	Tree	8 ft	Sun	Low	Zone 4b
wirestem muhly Muhlenbergia frondosa	Grass or grass-like	2 ft	Shade-tolerant	Medium	Zone 3b
woodland bluegrass Poa sylvestris	Grass or grass-like	3 ft	Shade-tolerant	High	Zone 4a
woolgrass Scirpus cyperinus	Grass or grass-like	4.9 ft	Sun–part shade	High	Zone 4a
wreath goldenrod Solidago caesia	Wildflower (forb)	3 ft	Sun–part shade	Medium	Zone 4b
wrinkleleaf goldenrod Solidago rugosa	Wildflower (forb)	3.3 ft	Sun–part shade	Medium	Zone 4a
yellow fumewort Corydalis flavula	Wildflower (forb)	1.5 ft	Sun–part shade	Medium	Zone 5b
yellow marsh marigold Caltha palustris	Wildflower (forb)	2 ft	Sun	High	Zone 3b
zigzag goldenrod Solidago flexicaulis	Wildflower (forb)	3 ft	Sun–part shade	Medium	Zone 5b

Other native species recorded here 342

PLANTS has no growing records for these, so light, moisture, height and zone filters cannot include them. Many are wild species seldom sold by nurseries.

agueweed Gentianella quinquefolia
Allegheny hawkweed Hieracium paniculatum
allegheny vine Adlumia fungosa
American alumroot Heuchera americana
American burnweed Erechtites hieraciifolius
American cancer-root Conopholis americana
American false pennyroyal Hedeoma pulegioides
American golden saxifrage Chrysosplenium americanum
American hogpeanut Amphicarpaea bracteata
American lopseed Phryma leptostachya
American marshpennywort Hydrocotyle americana
American spikenard Aralia racemosa
Apocynum ×floribundum Apocynum ×floribundum
Appalachian barren strawberry Waldsteinia fragarioides
arrowleaf violet Viola sagittata
bald spikerush Eleocharis erythropoda
bashful bulrush Trichophorum planifolium
bastard toadflax Comandra umbellata
bearded shorthusk Brachyelytrum erectum
beechdrops Epifagus virginiana
beggarslice Hackelia virginiana
biennial beeblossom Oenothera gaura
big devils beggartick Bidens vulgata
black baneberry Actaea racemosa
blackseed plantain Plantago rugelii
blisterwort Ranunculus recurvatus
bloodroot Sanguinaria canadensis
Blue Ridge blueberry Vaccinium pallidum
blue skullcap Scutellaria lateriflora
bluntleaf waterleaf Hydrophyllum canadense
bog yellowcress Rorippa palustris
Brazilian watermeal Wolffia brasiliensis
bristly greenbrier Smilax tamnoides
broad beechfern Phegopteris hexagonoptera
broad looseflower sedge Carex laxiflora
broadleaf sedge Carex platyphylla
brown widelip orchid Liparis liliifolia
browneyed Susan Rudbeckia triloba
bulblet bladderfern Cystopteris bulbifera
bulblet-bearing water hemlock Cicuta bulbifera
Canada lettuce Lactuca canadensis
Canada lily Lilium canadense
Canadian anemone Anemone canadensis
Canadian blacksnakeroot Sanicula canadensis
Canadian burnet Sanguisorba canadensis
Canadian clearweed Pilea pumila
Canadian honewort Cryptotaenia canadensis
Canadian white violet Viola canadensis
Canadian wildginger Asarum canadense
Canadian woodnettle Laportea canadensis
Carolina horsenettle Solanum carolinense
carpenter's square Scrophularia marilandica
Christmas fern Polystichum acrostichoides
clammy groundcherry Physalis heterophylla
clammy hedgehyssop Gratiola neglecta
clasping Venus' looking-glass Triodanis perfoliata
Clayton's sweetroot Osmorhiza claytonii
clustered blacksnakeroot Sanicula odorata
Columbian watermeal Wolffia columbiana
common boneset Eupatorium perfoliatum
common cinquefoil Potentilla simplex
common milkweed Asclepias syriaca
common moonseed Menispermum canadense
common pricklyash Zanthoxylum americanum
common woodrush Luzula multiflora
common yellow oxalis Oxalis stricta
crinkleroot Cardamine diphylla
Culver's root Veronicastrum virginicum
curlytop knotweed Polygonum lapathifolium
cutleaf grapefern Botrychium dissectum
cutleaf toothwort Cardamine concatenata
cypress panicgrass Dichanthelium dichotomum
dogtooth violet Erythronium americanum
dotted hawthorn Crataegus punctata
downy pagoda-plant Blephilia ciliata
downy rattlesnake plantain Goodyera pubescens
downy yellow false foxglove Aureolaria virginica
dutchman's breeches Dicentra cucullaria
dwarf cinquefoil Potentilla canadensis
dwarf ginseng Panax trifolius
early blue violet Viola ×palmata
early goldenrod Solidago juncea
early saxifrage Saxifraga virginiensis
earlyleaf brome Bromus latiglumis
eastern bottlebrush grass Elymus hystrix
eastern false rue anemone Enemion biternatum
eastern hayscented fern Dennstaedtia punctilobula
eastern marsh fern Thelypteris palustris
eastern poison ivy Toxicodendron radicans
eastern prickly gooseberry Ribes cynosbati
eastern waterleaf Hydrophyllum virginianum
ebony spleenwort Asplenium platyneuron
elmleaf goldenrod Solidago ulmifolia
Equisetum ×ferrissii Equisetum ×ferrissii
erect knotweed Polygonum erectum
eyebane Chamaesyce nutans
fairywand Chamaelirium luteum
fall phlox Phlox paniculata
false mermaidweed Floerkea proserpinacoides
fan clubmoss Lycopodium digitatum
feathery false lily of the valley Maianthemum racemosum
feverwort Triosteum perfoliatum
fibrousroot sedge Carex communis
field thistle Cirsium discolor
fire pink Silene virginica
fireberry hawthorn Crataegus chrysocarpa
fleshy hawthorn Crataegus succulenta
flowering spurge Euphorbia corollata
forked bluecurls Trichostema dichotomum
fourleaf milkweed Asclepias quadrifolia
fragrant bedstraw Galium triflorum
fringed loosestrife Lysimachia ciliata
giant ironweed Vernonia gigantea
giant sunflower Helianthus giganteus
glade fern Diplazium pycnocarpon
golden zizia Zizia aurea
Goldie's woodfern Dryopteris goldieana
grape honeysuckle Lonicera reticulata
great blue lobelia Lobelia siphilitica
great ragweed Ambrosia trifida
great waterleaf Hydrophyllum appendiculatum
Greek valerian Polemonium reptans
green adder's-mouth orchid Malaxis unifolia
green carpetweed Mollugo verticillata
green dragon Arisaema dracontium
grove bluegrass Poa alsodes
hairy angelica Angelica venenosa
hairy beardtongue Penstemon hirsutus
hairy bedstraw Galium pilosum
hairy pagoda-plant Blephilia hirsuta
hairy Solomon's seal Polygonatum pubescens
hairy sunflower Helianthus hirsutus
hairy wildrye Elymus villosus
hairy woodland brome Bromus pubescens
hairyjoint meadowparsnip Thaspium barbinode
heartleaf four o'clock Mirabilis nyctaginea
hedgehog woodrush Luzula echinata
hemlock waterparsnip Sium suave
hoary puccoon Lithospermum canescens
hoary skullcap Scutellaria incana
hoary ticktrefoil Desmodium canescens
honeyvine Cynanchum laeve
Howell's pussytoes Antennaria howellii
hybrid oak Quercus ×leana
Illinois pinweed Lechea racemulosa
Indian cucumber Medeola virginiana
Indian-tobacco Lobelia inflata
Indianpipe Monotropa uniflora
inflated narrow-leaf sedge Carex grisea
intermediate woodfern Dryopteris intermedia
James' sedge Carex jamesii
jumpseed Polygonum virginianum
lanceleaf buckthorn Rhamnus lanceolata
lanceleaf fogfruit Phyla lanceolata
lanceleaf wild licorice Galium lanceolatum
large whorled pogonia Isotria verticillata
largebracted plantain Plantago aristata
largeflower bellwort Uvularia grandiflora
largefruit blacksnakeroot Sanicula trifoliata
lesser clearweed Pilea fontana
licorice bedstraw Galium circaezans
limber honeysuckle Lonicera dioica
little evening primrose Oenothera perennis
lobed spleenwort Asplenium pinnatifidum
long beechfern Phegopteris connectilis
longleaf groundcherry Physalis longifolia
longleaf summer bluet Houstonia longifolia
longspur violet Viola rostrata
longstyle sweetroot Osmorhiza longistylis
lowland bladderfern Cystopteris protrusa
Lowrie's blue wood aster Symphyotrichum lowrieanum
man of the earth Ipomoea pandurata
mapleleaf goosefoot Chenopodium simplex
marginal woodfern Dryopteris marginalis
marsh blue violet Viola cucullata
marsh skullcap Scutellaria galericulata
Maximilian sunflower Helianthus maximiliani
mayapple Podophyllum peltatum
Miami mist Phacelia purshii
minute duckweed Lemna perpusilla
Missouri gooseberry Ribes missouriense
nakedflower ticktrefoil Desmodium nudiflorum
narrowleaf mountainmint Pycnanthemum tenuifolium
navel cornsalad Valerianella umbilicata
neckweed Veronica peregrina
New England aster Symphyotrichum novae-angliae
nodding chickweed Cerastium nutans
nodding wakerobin Trillium flexipes
northern bog aster Symphyotrichum boreale
northern dewberry Rubus flagellaris
Norwegian cinquefoil Potentilla norvegica
obedient plant Physostegia virginiana
one-cone clubmoss Lycopodium lagopus
oneflowered broomrape Orobanche uniflora
oneseed bur cucumber Sicyos angulatus
orangefruit horse-gentian Triosteum aurantiacum
paleleaf woodland sunflower Helianthus strumosus
palespike lobelia Lobelia spicata
parasol whitetop Doellingeria umbellata
Parlin's pussytoes Antennaria parlinii
partridgeberry Mitchella repens
pasture thistle Cirsium pumilum
Pennsylvania pellitory Parietaria pensylvanica
Pennsylvania sedge Carex pensylvanica
perfoliate bellwort Uvularia perfoliata
pointedleaf ticktrefoil Desmodium glutinosum
poison sumac Toxicodendron vernix
poke milkweed Asclepias exaltata
poverty dropseed Sporobolus vaginiflorus
poverty oatgrass Danthonia spicata
prostrate ticktrefoil Desmodium rotundifolium
purple chokeberry Aronia ×prunifolia
purple meadowparsnip Thaspium trifoliatum
purple milkwort Polygala sanguinea
purplestem angelica Angelica atropurpurea
queendevil Hieracium gronovii
rabbit-tobacco Pseudognaphalium obtusifolium
ramp Allium tricoccum
rattlesnakeweed Hieracium venosum
red hickory Carya ovalis
redwhisker clammyweed Polanisia dodecandra
ribbed sedge Carex virescens
richweed Collinsonia canadensis
robin's plantain Erigeron pulchellus
rock harlequin Corydalis sempervirens
rock muhly Muhlenbergia sobolifera
rock polypody Polypodium virginianum
rosepink Sabatia angularis
rosy sedge Carex rosea
rough barnyardgrass Echinochloa muricata
rough hawkweed Hieracium scabrum
roundleaf ragwort Packera obovata
rue anemone Thalictrum thalictroides
Sampson's snakeroot Orbexilum pedunculatum
sand violet Viola affinis
scaldweed Cuscuta gronovii
Schreber's aster Eurybia schreberi
seedbox Ludwigia alternifolia
sensitive fern Onoclea sensibilis
sensitive partridge pea Chamaecrista nictitans
sessileleaf bellwort Uvularia sessilifolia
shining clubmoss Huperzia lucidula
shiny wedgescale Sphenopholis nitida
Short's rockcress Arabis shortii
shrubby lespedeza Lespedeza frutescens
sicklepod Arabis canadensis
silver false spleenwort Deparia acrostichoides
skullcap speedwell Veronica scutellata
sleepy silene Silene antirrhina
slender looseflower sedge Carex gracilescens
slender toothwort Cardamine angustata
slender wedgescale Sphenopholis intermedia
slender yellow woodsorrel Oxalis dillenii
slenderleaf false foxglove Agalinis tenuifolia
slimspike threeawn Aristida longespica
small skullcap Scutellaria parvula
small woodland sunflower Helianthus microcephalus
smooth carrionflower Smilax herbacea
smooth forked nailwort Paronychia canadensis
smooth oxeye Heliopsis helianthoides
smooth rockcress Arabis laevigata
smooth rose Rosa blanda
smooth Solomon's seal Polygonatum biflorum
smooth yellow false foxglove Aureolaria flava
soft agrimony Agrimonia pubescens
soft fox sedge Carex conjuncta
Spanish needles Bidens bipinnata
spotted geranium Geranium maculatum
spotted sandmat Chamaesyce maculata
spotted water hemlock Cicuta maculata
spreading chervil Chaerophyllum procumbens
spreading dogbane Apocynum androsaemifolium
spring forget-me-not Myosotis verna
squirrel corn Dicentra canadensis
striped cream violet Viola striata
striped prince's pine Chimaphila maculata
swamp lousewort Pedicularis lanceolata
swamp thistle Cirsium muticum
swamp verbena Verbena hastata
sweet white violet Viola blanda
sweetscented joe pye weed Eutrochium purpureum
tall blue lettuce Lactuca biennis
tall rattlesnakeroot Prenanthes altissima
tall thimbleweed Anemone virginiana
tall thoroughwort Eupatorium altissimum
tall tickseed Coreopsis tripteris
thinleaf late purple aster Symphyotrichum phlogifolium
thinleaf sunflower Helianthus decapetalus
three-lobe violet Viola triloba
toadshade Trillium sessile
toothed spurge Euphorbia dentata
tower rockcress Arabis glabra
trailing arbutus Epigaea repens
twoflower dwarfdandelion Krigia biflora
twoleaf miterwort Mitella diphylla
upland boneset Eupatorium sessilifolium
upland brittle bladderfern Cystopteris tenuis
violet lespedeza Lespedeza violacea
violet woodsorrel Oxalis violacea
Virginia mountainmint Pycnanthemum virginianum
Virginia pepperweed Lepidium virginicum
Virginia plantain Plantago virginica
Virginia springbeauty Claytonia virginica
Virginia strawberry Fragaria virginiana
Virginia tephrosia Tephrosia virginiana
walking fern Asplenium rhizophyllum
wavyleaf aster Symphyotrichum undulatum
white arrowleaf aster Symphyotrichum urophyllum
white baneberry Actaea pachypoda
white bear sedge Carex albursina
white blue-eyed grass Sisyrinchium albidum
white fawnlily Erythronium albidum
white goldenrod Solidago bicolor
white heath aster Symphyotrichum ericoides
white snakeroot Ageratina altissima
white trillium Trillium grandiflorum
white turtlehead Chelone glabra
white vervain Verbena urticifolia
white wood aster Eurybia divaricata
whiteflower leafcup Polymnia canadensis
whitetinge sedge Carex albicans
whorled milkwort Polygala verticillata
whorled rosinweed Silphium trifoliatum
whorled yellow loosestrife Lysimachia quadrifolia
widowsfrill Silene stellata
wild cucumber Echinocystis lobata
wild hydrangea Hydrangea arborescens
wild yam Dioscorea villosa
wingstem Verbesina alternifolia
witchgrass Panicum capillare
wood anemone Anemone quinquefolia
woodfern Dryopteris ×triploidea
woodland flax Linum virginianum
woodland lettuce Lactuca floridana
woodland stonecrop Sedum ternatum
woodland strawberry Fragaria vesca
woodland sunflower Helianthus divaricatus
yellow avens Geum aleppicum
yellow fairybells Prosartes lanuginosa
yellow pimpernel Taenidia integerrima
yellow water buttercup Ranunculus flabellaris
yellowseed false pimpernel Lindernia dubia

Also listed as native and introduced here 3

PLANTS labels these species both native and introduced in this state: some forms are native and others were brought in from elsewhere. Most gardeners should choose plants from the main list.

annual ragweedAmbrosia artemisiifolia
climbing false buckwheatPolygonum scandens
hedge false bindweedCalystegia sepium

Compared with Ohio

The typical county is the median of the 88 Ohio counties with PLANTS county records; the statewide figure counts every species native anywhere in the state. More species is not better or worse: counties differ in size, habitat and how thoroughly they have been surveyed.

Native species counts, Knox County and Ohio
Measure	Knox County	Typical county	Statewide
Native species	622	559	1,740
Garden-ready natives	280	241	594
Tree	86	—	160
Shrub	35	—	94
Wildflower (forb)	367	—	939
Grass or grass-like	77	—	400
Vine	27	—	62
Fern	30	—	85

Neighboring counties

Counties that share a ZIP code with Knox County.

Ashland County, OH 276 garden-ready
Coshocton County, OH 274 garden-ready
Delaware County, OH 202 garden-ready
Holmes County, OH 261 garden-ready
Licking County, OH 310 garden-ready
Morrow County, OH 192 garden-ready
Muskingum County, OH 234 garden-ready
Richland County, OH 255 garden-ready

Source & data date

Source: USDA NRCS PLANTS Database: county distribution records, native status and plant characteristics. CC0 (public domain dedication, per the data.gov catalog record).; Kew’s World Checklist of Vascular Plants (WCVP): native or introduced status by state. CC BY 3.0.; USGS US-RIIS (ver. 2.0): species listed as introduced are excluded. CC0.
Citation: USDA, NRCS. 2026. The PLANTS Database (https://plants.usda.gov, 11/04/2026). National Plant Data Team, Greensboro, NC USA.; Govaerts R. (ed.) (2026). WCVP: World Checklist of Vascular Plants. Facilitated by the Royal Botanic Gardens, Kew. Data file dated 2026-06-04, http://sftp.kew.org/pub/data-repositories/WCVP/ (retrieved 2026-11-04). Paper: Govaerts R. et al. (2021) The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. Scientific Data 8, 215.
Data date: Retrieved from PLANTS on November 4, 2026; WCVP data file dated June 4, 2026.
Zones: USDA Plant Hardiness Zone Map (2023) ZIP table: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 3, 2026. Plant zones on this site are our estimate, not the official map.
Scope: Knox County (county FIPS 39083), Ohio. 622 native species from PLANTS county distribution records; garden-ready = species with a PLANTS characteristics record.
Method: A species is listed when it is recorded as native to the state in Kew’s World Checklist of Vascular Plants and USDA PLANTS, and recorded in the county by USDA PLANTS. Species PLANTS labels both native and introduced are listed separately. Full method · All sources

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