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Native plants recorded in your state and county

Native plants · Indiana

Native plants of Knox County

644 plant species are recorded as native to Indiana in Kew’s World Checklist of Vascular Plants and USDA PLANTS, and recorded in Knox County by USDA PLANTS. 285 of them have growing records you can filter by light, moisture, height and estimated cold hardiness. 5 more species are listed as both native and introduced and kept in a separate section.

County summary · USDA PLANTS and Kew WCVP

Knox County, Indiana

Native species
644 Typical Indiana county: 494 (median of 92 counties)
Garden-ready natives
285 Typical Indiana county: 211
Share by type (all 644 native species)
Percent of the 644 native species in each growth type
Tree 12% (80)
Shrub 3% (18)
Wildflower (forb) 57% (370)
Grass or grass-like 19% (125)
Vine 5% (35)
Fern 2% (16)

Wildflowers make up the largest share of the native list (57%), followed by grasses and grass-like plants (19%).

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 6b (2023 map).

The native plant list

Cold hardiness is estimated from each plant’s PLANTS minimum temperature. How we estimate it.

Garden-ready natives 285

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

Garden-ready native plants of Knox County, Indiana
PlantType HeightLight Water useHardy to
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 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 lotus Nelumbo lutea Wildflower (forb) 3 ft Sun High Zone 3b
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 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
arrowleaf tearthumb Polygonum sagittatum Vine 1 ft Sun Medium Zone 6a
bald cypress Taxodium distichum Tree 130 ft Sun–part shade High Zone 5b
beaked agrimony Agrimonia rostellata Wildflower (forb) 2.3 ft Sun–part shade Medium Zone 4a
bearded beggarticks Bidens aristosa Wildflower (forb) 3.5 ft Sun–part shade High Zone 12b
big bluestem Andropogon gerardii Grass or grass-like 6 ft Sun Low Zone 2b
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 oak Quercus velutina Tree 80 ft Sun–part shade Medium Zone 4a
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
blackhaw Viburnum prunifolium Tree 16 ft Shade-tolerant Medium Zone 4a
blackjack oak Quercus marilandica Tree 25 ft Sun Low Zone 6a
blue mistflower Conoclinium coelestinum Wildflower (forb) 3.2 ft Shade-tolerant Medium Zone 6a
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
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
broadleaf arrowhead Sagittaria latifolia Wildflower (forb) 4.9 ft Sun High Zone 4a
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
butterweed Packera glabella Wildflower (forb) 3.2 ft Sun High Zone 10b
calico aster Symphyotrichum lateriflorum Wildflower (forb) 4 ft Sun Medium Zone 4a
Canada goldenrod Solidago altissima Wildflower (forb) 5 ft Sun–part shade Medium Zone 4b
Canada goldenrod Solidago canadensis Wildflower (forb) 3.5 ft Sun Medium Zone 3a
Canada wildrye Elymus canadensis Grass or grass-like 3 ft Shade-tolerant Medium Zone 3a
Canadian horseweed Conyza canadensis Wildflower (forb) 5 ft Sun Medium Zone 12b
Canadian milkvetch Astragalus canadensis Wildflower (forb) 6 in Sun Medium Zone 3b
Canadian rush Juncus canadensis Grass or grass-like 3.2 ft Sun–part shade Medium Zone 4a
Canadian waterweed Elodea canadensis Wildflower (forb) — Sun High Zone 4a
cardinalflower Lobelia cardinalis Wildflower (forb) 5.9 ft Shade-tolerant Low Zone 4a
Carolina elephantsfoot Elephantopus carolinianus Wildflower (forb) 2.7 ft Sun Medium Zone 6a
Carolina foxtail Alopecurus carolinianus Grass or grass-like 1.7 ft Sun Low Zone 3a
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
catbird grape Vitis palmata Vine 30 ft Sun–part shade Medium Zone 6a
catchfly grass Leersia lenticularis Grass or grass-like 2.6 ft Sun Medium Zone 4a
chestnut oak Quercus montana Tree 73 ft Sun–part shade Medium Zone 4a
chinquapin oak Quercus muehlenbergii Tree 70 ft Sun Medium Zone 4a
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 buttonbush Cephalanthus occidentalis Tree 15 ft Shade-tolerant High Zone 4a
common duckweed Lemna minor Wildflower (forb) — Sun High Zone 3b
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 persimmon Diospyros virginiana Tree 55 ft Shade-tolerant Medium Zone 5a
common selfheal Prunella vulgaris Wildflower (forb) 1.5 ft Sun–part shade Medium Zone 3b
common sneezeweed Helenium autumnale Wildflower (forb) 4.9 ft Sun Medium Zone 3a
composite dropseed Sporobolus compositus Grass or grass-like 3 ft Sun Low 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
crimsoneyed rosemallow Hibiscus moscheutos Wildflower (forb) 6.6 ft Sun High Zone 6a
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
disk waterhyssop Bacopa rotundifolia Wildflower (forb) 1 in Sun High Zone 4a
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
drooping sedge Carex prasina Grass or grass-like 2.3 ft Shade-tolerant Medium Zone 4b
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 narrowleaf sedge Carex amphibola Grass or grass-like 2 ft Shade-tolerant Medium Zone 7a
eastern redbud Cercis canadensis Tree 30 ft Shade-tolerant Low Zone 4b
eastern redcedar Juniperus virginiana Tree 50 ft Sun–part shade Low Zone 3a
eastern swampprivet Forestiera acuminata Tree 33 ft Shade-tolerant High Zone 5b
eastern woodland sedge Carex blanda Grass or grass-like 2 ft Shade-tolerant High Zone 4b
fall panicgrass Panicum dichotomiflorum Grass or grass-like 3.3 ft Sun High Zone 3a
false daisy Eclipta prostrata Wildflower (forb) 3.2 ft Sun–part shade Medium Zone 10b
field paspalum Paspalum laeve Grass or grass-like 2.9 ft Sun–part shade Medium Zone 6a
field pussytoes Antennaria neglecta Wildflower (forb) 1 ft Sun Low Zone 3b
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
fragrant flatsedge Cyperus odoratus Grass or grass-like 2 ft Sun Medium Zone 11b
fringed sedge Carex crinita Grass or grass-like 5.2 ft Sun–part shade Medium Zone 4a
fringeleaf wild petunia Ruellia humilis Wildflower (forb) 2.6 ft Shade-tolerant Low Zone 4a
Georgia bulrush Scirpus georgianus Grass or grass-like 4.5 ft Sun–part shade Medium Zone 3b
giant cane Arundinaria gigantea Shrub 25 ft Sun Medium Zone 5a
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
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
graybark grape Vitis cinerea Vine 50 ft Sun–part shade Medium Zone 6b
greater straw sedge Carex normalis Grass or grass-like 5 ft Shade-tolerant High Zone 4a
green arrow arum Peltandra virginica Wildflower (forb) 2.3 ft Sun–part shade High Zone 5a
green ash Fraxinus pennsylvanica Tree 80 ft Shade-tolerant Medium Zone 2b
green bulrush Scirpus atrovirens Grass or grass-like 5.9 ft Sun Medium Zone 2a
groundnut Apios americana Vine 1 ft Shade-tolerant Medium Zone 5a
hairy sedge Carex lacustris Grass or grass-like 5 ft Shade-tolerant High Zone 4b
hairy white oldfield aster Symphyotrichum pilosum Wildflower (forb) 3 ft Shade-tolerant Medium Zone 4a
halberdleaf rosemallow Hibiscus laevis Wildflower (forb) 8 ft Sun–part shade High Zone 6a
harvestlice Agrimonia parviflora Wildflower (forb) 6 ft Sun–part shade High Zone 4a
heartleaf peppervine Ampelopsis cordata Vine 2 ft Shade-tolerant Medium Zone 6b
honeylocust Gleditsia triacanthos Tree 70 ft Sun Medium Zone 3b
hop sedge Carex lupulina Grass or grass-like 4.3 ft Sun–part shade Medium Zone 3b
horsetail paspalum Paspalum fluitans Grass or grass-like 2.5 ft Sun–part shade High Zone 5a
Indian woodoats Chasmanthium latifolium Grass or grass-like 4.6 ft Shade-tolerant Medium Zone 4a
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
inland rush Juncus interior Grass or grass-like 3 ft Sun–part shade Medium 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 loosestrife Lysimachia lanceolata Wildflower (forb) 2.5 ft Shade-tolerant Medium Zone 5a
late purple aster Symphyotrichum patens Wildflower (forb) 2.5 ft Shade-tolerant Medium Zone 3b
leafy pondweed Potamogeton foliosus Wildflower (forb) — Sun High Zone 3b
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
limestone wild petunia Ruellia strepens Wildflower (forb) 3.6 ft Shade-tolerant Low Zone 6a
little barley Hordeum pusillum Grass or grass-like 1.2 ft Sun Medium Zone 10b
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 pondweed Potamogeton nodosus Wildflower (forb) — Sun High Zone 3b
marsh flatsedge Cyperus pseudovegetus Grass or grass-like 2.5 ft Sun High Zone 8a
marsh seedbox Ludwigia palustris Wildflower (forb) 2 in Sun High Zone 4a
Maryland senna Senna marilandica Wildflower (forb) 6.6 ft Sun–part shade Low Zone 5b
Mexican muhly Muhlenbergia mexicana Grass or grass-like 3 ft Sun–part shade Medium Zone 4a
Missouri ironweed Vernonia missurica Wildflower (forb) 6 ft Sun Medium Zone 4a
mockernut hickory Carya tomentosa Tree 85 ft Sun–part shade 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
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
oldfield blackberry Rubus alumnus Shrub 5 ft Sun–part shade Medium Zone 4b
orangegrass Hypericum gentianoides Wildflower (forb) 2 ft Sun–part shade Low Zone 12a
overcup oak Quercus lyrata Tree 80 ft Sun–part shade High Zone 5a
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
partridge pea Chamaecrista fasciculata Wildflower (forb) 2.4 ft Shade-tolerant Medium Zone 7a
pawpaw Asimina triloba Tree 25 ft Shade-tolerant Medium Zone 4b
pecan Carya illinoinensis Tree 120 ft Sun High Zone 5a
Pennsylvania smartweed Polygonum pensylvanicum Wildflower (forb) 3.9 ft Sun Medium Zone 10b
perplexed ticktrefoil Desmodium perplexum Wildflower (forb) 4 ft Sun–part shade Medium Zone 4a
Philadelphia fleabane Erigeron philadelphicus Wildflower (forb) 2.8 ft Sun–part shade Medium Zone 4b
pickerelweed Pontederia cordata Wildflower (forb) 3.2 ft Sun High Zone 5a
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
possumhaw Ilex decidua Tree 33 ft Shade-tolerant Medium Zone 5b
post oak Quercus stellata Tree 60 ft Sun Medium Zone 4a
poverty rush Juncus tenuis Grass or grass-like 1.5 ft Sun–part shade Medium Zone 3b
prairie cordgrass Spartina pectinata Grass or grass-like 8 ft Sun High Zone 3b
prairie crab apple Malus ioensis Tree 25 ft Sun Medium Zone 4b
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
pumpkin ash Fraxinus profunda Tree 120 ft Sun–part shade High Zone 5a
purple lovegrass Eragrostis spectabilis Grass or grass-like 11 in Sun Low Zone 3a
purple prairie clover Dalea purpurea Wildflower (forb) 3 ft Sun Medium Zone 3b
purplehead sneezeweed Helenium flexuosum Wildflower (forb) 3.2 ft Sun Low Zone 4b
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
rattlesnake fern Botrychium virginianum Fern 1.4 ft Shade-tolerant Medium Zone 3b
ravenfoot sedge Carex crus-corvi Grass or grass-like 3 ft Sun–part shade Medium Zone 4b
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
redroot flatsedge Cyperus erythrorhizos Grass or grass-like 2.5 ft Sun Medium Zone 11a
redtop panicgrass Panicum rigidulum Grass or grass-like 3.3 ft Sun High Zone 4a
rice cutgrass Leersia oryzoides Grass or grass-like 4.9 ft Sun High Zone 4a
river birch Betula nigra Tree 70 ft Sun High Zone 4a
river bulrush Bolboschoenus fluviatilis Grass or grass-like 6.6 ft Sun Medium Zone 3b
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
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
roundhead lespedeza Lespedeza capitata Wildflower (forb) 2.6 ft Sun 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
sandbar willow Salix interior Tree 30 ft Sun — Zone 1a
sassafras Sassafras albidum Tree 75 ft Sun Low Zone 4b
sawtooth blackberry Rubus argutus Shrub 8.2 ft Sun Medium Zone 6a
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
shagbark hickory Carya ovata Tree 75 ft Sun–part shade Medium Zone 3a
sharpwing monkeyflower Mimulus alatus Wildflower (forb) 2.3 ft Shade-tolerant High Zone 5a
shellbark hickory Carya laciniosa Tree 100 ft Shade-tolerant High Zone 5a
shingle oak Quercus imbricaria Tree 45 ft Sun Medium Zone 5b
shoreline sedge Carex hyalinolepis Grass or grass-like 4 ft Sun–part shade High Zone 4b
Short's sedge Carex shortiana Grass or grass-like 3 ft Sun–part shade High Zone 5b
shrubby St. Johnswort Hypericum prolificum Shrub 3.2 ft Sun–part shade High Zone 4b
Shumard's oak Quercus shumardii Tree 100 ft Sun Medium Zone 5a
sideoats grama Bouteloua curtipendula Grass or grass-like 3 ft Sun Medium Zone 3a
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
slender flatsedge Cyperus bipartitus Grass or grass-like 5 ft Sun Medium Zone 10b
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
smallspike false nettle Boehmeria cylindrica Wildflower (forb) 3.9 ft Shade-tolerant Medium Zone 4a
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 phlox Phlox glaberrima Wildflower (forb) 3 ft Sun–part shade High Zone 4b
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 red oak Quercus falcata Tree 75 ft Sun–part shade Medium Zone 6a
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
stalkless yellowcress Rorippa sessiliflora Wildflower (forb) 1.5 ft Sun–part shade High Zone 12b
stiff dogwood Cornus foemina Tree 16 ft Sun–part shade Medium Zone 7a
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
sugarberry Celtis laevigata Tree 80 ft Shade-tolerant High Zone 5a
summer grape Vitis aestivalis Vine 30 ft Shade-tolerant Medium Zone 5a
swamp cottonwood Populus heterophylla Tree 100 ft Sun High Zone 5a
swamp loosestrife Decodon verticillatus Shrub 8 ft Sun–part shade 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 woodreed Cinna arundinacea Grass or grass-like 4.9 ft Shade-tolerant Low Zone 4a
sweetgum Liquidambar styraciflua Tree 100 ft Sun High Zone 5a
switchgrass Panicum virgatum Grass or grass-like 5 ft Sun Medium Zone 3a
taperleaf water horehound Lycopus rubellus Wildflower (forb) 1.6 ft Shade-tolerant High Zone 5a
teal lovegrass Eragrostis hypnoides Grass or grass-like 4 in Sun High Zone 3b
tiny mousetail Myosurus minimus Wildflower (forb) 5 in Sun–part shade Medium Zone 12b
toad rush Juncus bufonius Grass or grass-like 1 ft Sun Medium Zone 12a
trumpet creeper Campsis radicans Vine 2 ft Sun Low Zone 6a
tuliptree Liriodendron tulipifera Tree 120 ft Sun Medium Zone 5b
twoheaded water-starwort Callitriche heterophylla Wildflower (forb) — Sun High Zone 4a
upland bentgrass Agrostis perennans Grass or grass-like 3.5 ft Sun–part shade High Zone 4a
valley redstem Ammannia coccinea Wildflower (forb) 1.6 ft Sun Medium Zone 3b
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 dayflower Commelina virginica Wildflower (forb) 3.5 ft Shade-tolerant Medium Zone 5b
Virginia iris Iris virginica Wildflower (forb) 3.3 ft Shade-tolerant High Zone 8b
Virginia spiderwort Tradescantia virginiana Wildflower (forb) 1.1 ft Sun–part shade Medium Zone 3b
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 locust Gleditsia aquatica Tree 40 ft Sun–part shade — Zone 10a
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 doll's daisy Boltonia asteroides Wildflower (forb) 8 ft Sun–part shade Medium Zone 3b
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 prairie clover Dalea candida Wildflower (forb) 2 ft Sun–part shade Medium Zone 3b
whitegrass Leersia virginica Grass or grass-like 3.9 ft Shade-tolerant Medium Zone 3a
whiteroot rush Juncus brachycarpus Grass or grass-like 3 ft Sun–part shade Medium Zone 5a
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
winged sumac Rhus copallinum Tree 8 ft Sun Low Zone 4b
winter bentgrass Agrostis hyemalis Grass or grass-like 3.5 ft Sun–part shade High Zone 4a
woodland bluegrass Poa sylvestris Grass or grass-like 3 ft Shade-tolerant High Zone 4a
woodland muhly Muhlenbergia sylvatica Grass or grass-like 3 ft Sun–part shade Medium Zone 4b
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
yellow passionflower Passiflora lutea Vine 16 ft Shade-tolerant Low Zone 5a

Other native species recorded here 359

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.

  • Allegheny monkeyflower Mimulus ringens
  • amberique-bean Strophostyles helvola
  • American alumroot Heuchera americana
  • American beakgrain Diarrhena americana
  • American burnweed Erechtites hieraciifolius
  • American columbo Frasera caroliniensis
  • American false pennyroyal Hedeoma pulegioides
  • American ginseng Panax quinquefolius
  • American hogpeanut Amphicarpaea bracteata
  • American senna Senna hebecarpa
  • angularfruit milkvine Matelea gonocarpos
  • aquatic milkweed Asclepias perennis
  • arrowfeather threeawn Aristida purpurascens
  • arrowleaf violet Viola sagittata
  • ashy sunflower Helianthus mollis
  • beaked panicgrass Panicum anceps
  • bearded flatsedge Cyperus squarrosus
  • bearded shorthusk Brachyelytrum erectum
  • beechdrops Epifagus virginiana
  • beggarslice Hackelia virginiana
  • biennial beeblossom Oenothera gaura
  • big devils beggartick Bidens vulgata
  • bigbract verbena Verbena bracteata
  • blackfoot quillwort Isoetes melanopoda
  • blisterwort Ranunculus recurvatus
  • bloodroot Sanguinaria canadensis
  • bloody butcher Trillium recurvatum
  • blue ash Fraxinus quadrangulata
  • blue skullcap Scutellaria lateriflora
  • blue waxweed Cuphea viscosissima
  • bluejacket Tradescantia ohiensis
  • bluntlobe cliff fern Woodsia obtusa
  • Bosc's panicgrass Dichanthelium boscii
  • bottomland aster Symphyotrichum ontarionis
  • bride's feathers Aruncus dioicus
  • bristly greenbrier Smilax tamnoides
  • broad beechfern Phegopteris hexagonoptera
  • brome-like sedge Carex bromoides
  • brown widelip orchid Liparis liliifolia
  • browneyed Susan Rudbeckia triloba
  • bulblet bladderfern Cystopteris bulbifera
  • camphor pluchea Pluchea camphorata
  • Canada lettuce Lactuca canadensis
  • Canadian anemone Anemone canadensis
  • Canadian blacksnakeroot Sanicula canadensis
  • Canadian clearweed Pilea pumila
  • Canadian honewort Cryptotaenia canadensis
  • Canadian wildginger Asarum canadense
  • Canadian woodnettle Laportea canadensis
  • Carolina coralbead Cocculus carolinus
  • Carolina draba Draba reptans
  • Carolina geranium Geranium carolinianum
  • Carolina horsenettle Solanum carolinense
  • Carolina leaf-flower Phyllanthus caroliniensis
  • Carolina mosquitofern Azolla caroliniana
  • Carolina puccoon Lithospermum caroliniense
  • Carolina wild petunia Ruellia caroliniensis
  • carpenter's square Scrophularia marilandica
  • Chapman's bluegrass Poa chapmaniana
  • Christmas fern Polystichum acrostichoides
  • clammy hedgehyssop Gratiola neglecta
  • clasping milkweed Asclepias amplexicaulis
  • clasping Venus' looking-glass Triodanis perfoliata
  • common boneset Eupatorium perfoliatum
  • common cinquefoil Potentilla simplex
  • common moonseed Menispermum canadense
  • common pricklyash Zanthoxylum americanum
  • common threeseed mercury Acalypha rhomboidea
  • common yellow oxalis Oxalis stricta
  • compact dodder Cuscuta compacta
  • cream avens Geum virginianum
  • creeping burhead Echinodorus cordifolius
  • creeping lespedeza Lespedeza repens
  • creeping St. Johnswort Hypericum adpressum
  • crossvine Bignonia capreolata
  • Culver's root Veronicastrum virginicum
  • Cuman ragweed Ambrosia psilostachya
  • curlytop knotweed Polygonum lapathifolium
  • cutleaf evening primrose Oenothera laciniata
  • cutleaf grapefern Botrychium dissectum
  • cutleaf toothwort Cardamine concatenata
  • Davis' sedge Carex davisii
  • densetuft hairsedge Bulbostylis capillaris
  • downy carrionflower Smilax pulverulenta
  • downy gentian Gentiana puberulenta
  • downy hawthorn Crataegus mollis
  • downy pagoda-plant Blephilia ciliata
  • dutchman's breeches Dicentra cucullaria
  • dwarf horseweed Conyza ramosissima
  • dwarf larkspur Delphinium tricorne
  • dwarf plantain Plantago pusilla
  • early goldenrod Solidago juncea
  • eastern bluestar Amsonia tabernaemontana
  • eastern bottlebrush grass Elymus hystrix
  • eastern greenviolet Hybanthus concolor
  • eastern marsh fern Thelypteris palustris
  • eastern poison ivy Toxicodendron radicans
  • ebony spleenwort Asplenium platyneuron
  • Elliott's bentgrass Agrostis elliottiana
  • erect knotweed Polygonum erectum
  • fall phlox Phlox paniculata
  • fall witchgrass Digitaria cognata
  • false boneset Brickellia eupatorioides
  • false Indian plantain Hasteola suaveolens
  • fen grass of Parnassus Parnassia glauca
  • fernleaf phacelia Phacelia bipinnatifida
  • fescue sedge Carex festucacea
  • fewleaf sunflower Helianthus occidentalis
  • field pansy Viola bicolor
  • floating mannagrass Glyceria septentrionalis
  • flowering spurge Euphorbia corollata
  • forked bluecurls Trichostema dichotomum
  • fourflower yellow loosestrife Lysimachia quadriflora
  • fourleaf yam Dioscorea quaternata
  • fringed loosestrife Lysimachia ciliata
  • fuzzy wuzzy sedge Carex hirsutella
  • Gattinger's panicgrass Panicum gattingeri
  • giant ironweed Vernonia gigantea
  • giant sedge Carex gigantea
  • globe flatsedge Cyperus echinatus
  • golden zizia Zizia aurea
  • goldenseal Hydrastis canadensis
  • grassleaf mudplantain Heteranthera dubia
  • gravelweed Verbesina helianthoides
  • great blue lobelia Lobelia siphilitica
  • Great Plains flatsedge Cyperus lupulinus
  • great ragweed Ambrosia trifida
  • great waterleaf Hydrophyllum appendiculatum
  • greater marsh St. Johnswort Triadenum walteri
  • Greek valerian Polemonium reptans
  • green dragon Arisaema dracontium
  • hairy bedstraw Galium pilosum
  • hairy forked nailwort Paronychia fastigiata
  • hairy pagoda-plant Blephilia hirsuta
  • hairy small-leaf ticktrefoil Desmodium ciliare
  • hairy sunflower Helianthus hirsutus
  • hairy wildrye Elymus villosus
  • hairyfruit chervil Chaerophyllum tainturieri
  • hairyjoint meadowparsnip Thaspium barbinode
  • hairyseed paspalum Paspalum pubiflorum
  • harvestbells Gentiana saponaria
  • heartleaf four o'clock Mirabilis nyctaginea
  • heartleaf plantain Plantago cordata
  • heartleaf skullcap Scutellaria ovata
  • heavy sedge Carex gravida
  • hedgehog woodrush Luzula echinata
  • Heller's rosette grass Dichanthelium oligosanthes
  • hemlock waterparsnip Sium suave
  • hoary frostweed Helianthemum bicknellii
  • hoary puccoon Lithospermum canescens
  • hoary skullcap Scutellaria incana
  • hoary ticktrefoil Desmodium canescens
  • hoary verbena Verbena stricta
  • honeyvine Cynanchum laeve
  • husk tomato Physalis pubescens
  • Illinois ticktrefoil Desmodium illinoense
  • Indian-tobacco Lobelia inflata
  • James' sedge Carex jamesii
  • jumpseed Polygonum virginianum
  • kidneyleaf mudplantain Heteranthera reniformis
  • lakecress Neobeckia aquatica
  • lanceleaf fogfruit Phyla lanceolata
  • largeflower bellwort Uvularia grandiflora
  • lateflowering thoroughwort Eupatorium serotinum
  • Leavenworth's sedge Carex leavenworthii
  • lizard's tail Saururus cernuus
  • longbranch frostweed Helianthemum canadense
  • longleaf groundcherry Physalis longifolia
  • longsepal beardtongue Penstemon calycosus
  • longstyle sweetroot Osmorhiza longistylis
  • Louisiana sedge Carex louisianica
  • low nutrush Scleria verticillata
  • low spikesedge Kyllinga pumila
  • lowland rotala Rotala ramosior
  • lowland yellow loosestrife Lysimachia hybrida
  • man of the earth Ipomoea pandurata
  • manyfruit primrose-willow Ludwigia polycarpa
  • mapleleaf goosefoot Chenopodium simplex
  • marsh mermaidweed Proserpinaca palustris
  • Maryland meadowbeauty Rhexia mariana
  • mat sandbur Cenchrus longispinus
  • matted spikerush Eleocharis intermedia
  • mayapple Podophyllum peltatum
  • Mead's sedge Carex meadii
  • Mexican plum Prunus mexicana
  • Miami mist Phacelia purshii
  • Missouri violet Viola missouriensis
  • mucronate sprangletop Leptochloa panicea
  • Muhlenberg's sedge Carex muehlenbergii
  • mullein foxglove Dasistoma macrophylla
  • nakedflower ticktrefoil Desmodium nudiflorum
  • narrowleaf mountainmint Pycnanthemum tenuifolium
  • narrowleaf paleseed Leucospora multifida
  • neckweed Veronica peregrina
  • New England aster Symphyotrichum novae-angliae
  • nodding chickweed Cerastium nutans
  • nodding evening primrose Oenothera nutans
  • nodding muhly Muhlenbergia bushii
  • northern dewberry Rubus flagellaris
  • Norwegian cinquefoil Potentilla norvegica
  • obedient plant Physostegia virginiana
  • oneseed bur cucumber Sicyos angulatus
  • orange coneflower Rudbeckia fulgida
  • pale dock Rumex altissimus
  • pale Indian plantain Arnoglossum atriplicifolium
  • Parlin's pussytoes Antennaria parlinii
  • Pennsylvania pellitory Parietaria pensylvanica
  • pineland threeseed mercury Acalypha ostryifolia
  • pleatleaf knotweed Polygonum tenue
  • pointedleaf ticktrefoil Desmodium glutinosum
  • poison sumac Toxicodendron vernix
  • poorjoe Diodia teres
  • poverty dropseed Sporobolus vaginiflorus
  • poverty oatgrass Danthonia spicata
  • prairie ironweed Vernonia fasciculata
  • prairie rosinweed Silphium terebinthinaceum
  • prairie threeawn Aristida oligantha
  • pubescent sedge Carex hirtifolia
  • puffsheath dropseed Sporobolus neglectus
  • purple false foxglove Agalinis purpurea
  • purple meadow-rue Thalictrum dasycarpum
  • purple milkweed Asclepias purpurascens
  • purple milkwort Polygala sanguinea
  • purple passionflower Passiflora incarnata
  • purplerocket Iodanthus pinnatifidus
  • queen of the prairie Filipendula rubra
  • red columbine Aquilegia canadensis
  • red hickory Carya ovalis
  • redwhisker clammyweed Polanisia dodecandra
  • River Broom-Rape Orobanche riparia
  • rosemallow Hibiscus lasiocarpos
  • rosepink Sabatia angularis
  • rosy sedge Carex rosea
  • rough dropseed Sporobolus clandestinus
  • rough rattlesnakeroot Prenanthes aspera
  • roundseed panicgrass Dichanthelium sphaerocarpon
  • roundseed St. Johnswort Hypericum sphaerocarpum
  • s-curve threeawn Aristida ramosissima
  • Sampson's snakeroot Orbexilum pedunculatum
  • sand bittercress Cardamine parviflora
  • sand hickory Carya pallida
  • sand violet Viola affinis
  • scaldweed Cuscuta gronovii
  • seedbox Ludwigia alternifolia
  • sensitive fern Onoclea sensibilis
  • sensitive partridge pea Chamaecrista nictitans
  • sessileleaf bellwort Uvularia sessilifolia
  • sessileleaf ticktrefoil Desmodium sessilifolium
  • shining bedstraw Galium concinnum
  • Short's rockcress Arabis shortii
  • shortbeak arrowhead Sagittaria brevirostra
  • shortbeak sedge Carex brevior
  • shortpod draba Draba brachycarpa
  • shortstalk false bindweed Calystegia silvatica
  • showy orchid Galearis spectabilis
  • shrubby lespedeza Lespedeza frutescens
  • silky dogwood Cornus obliqua
  • sixweeks fescue Vulpia octoflora
  • sleepy silene Silene antirrhina
  • slender crabgrass Digitaria filiformis
  • slender fimbry Fimbristylis autumnalis
  • slender lespedeza Lespedeza virginica
  • slender looseflower sedge Carex gracilescens
  • slender threeseed mercury Acalypha gracilens
  • slender wedgescale Sphenopholis intermedia
  • slenderleaf false foxglove Agalinis tenuifolia
  • slimflower muhly Muhlenbergia tenuiflora
  • slimflower scurfpea Psoralidium tenuiflorum
  • slimspike threeawn Aristida longespica
  • small skullcap Scutellaria parvula
  • smooth false buttonweed Spermacoce glabra
  • smooth forked nailwort Paronychia canadensis
  • smooth oxeye Heliopsis helianthoides
  • smooth rockcress Arabis laevigata
  • smooth Solomon's seal Polygonatum biflorum
  • sneezeweed Helenium amarum
  • soft agrimony Agrimonia pubescens
  • southern mountainmint Pycnanthemum pycnanthemoides
  • Spanish needles Bidens bipinnata
  • spoonleaf purple everlasting Gamochaeta purpurea
  • spotted geranium Geranium maculatum
  • spotted sandmat Chamaesyce maculata
  • spotted water hemlock Cicuta maculata
  • spreading chervil Chaerophyllum procumbens
  • spreading sandmat Chamaesyce humistrata
  • spring blue eyed Mary Collinsia verna
  • spring coralroot Corallorhiza wisteriana
  • spring forget-me-not Myosotis verna
  • Standley's goosefoot Chenopodium standleyanum
  • stiff cowbane Oxypolis rigidior
  • stiff sunflower Helianthus pauciflorus
  • stout rush Juncus nodatus
  • striped cream violet Viola striata
  • swamp dock Rumex verticillatus
  • swamp lousewort Pedicularis lanceolata
  • swamp verbena Verbena hastata
  • sweet coneflower Rudbeckia subtomentosa
  • tall thimbleweed Anemone virginiana
  • tall thistle Cirsium altissimum
  • tall tickseed Coreopsis tripteris
  • Tennessee bladderfern Cystopteris tennesseensis
  • thicket bean Phaseolus polystachios
  • thin paspalum Paspalum setaceum
  • threadleaf crowfoot Ranunculus trichophyllus
  • three-lobe violet Viola triloba
  • toadshade Trillium sessile
  • toothed spurge Euphorbia dentata
  • tufted lovegrass Eragrostis pectinacea
  • twoleaf miterwort Mitella diphylla
  • upland boneset Eupatorium sessilifolium
  • veiny skullcap Scutellaria nervosa
  • Venus' pride Houstonia purpurea
  • violet lespedeza Lespedeza violacea
  • violet woodsorrel Oxalis violacea
  • Virginia groundcherry Physalis virginiana
  • Virginia mountainmint Pycnanthemum virginianum
  • Virginia pepperweed Lepidium virginicum
  • Virginia plantain Plantago virginica
  • Virginia snakeroot Aristolochia serpentaria
  • Virginia springbeauty Claytonia virginica
  • Virginia strawberry Fragaria virginiana
  • Virginia tephrosia Tephrosia virginiana
  • Virginia winged rockcress Sibara virginica
  • walking fern Asplenium rhizophyllum
  • warty spurge Euphorbia spathulata
  • waxyfruit hawthorn Crataegus pruinosa
  • waxyleaf meadow-rue Thalictrum revolutum
  • western rockjasmine Androsace occidentalis
  • western tansymustard Descurainia pinnata
  • white baneberry Actaea pachypoda
  • white blue-eyed grass Sisyrinchium albidum
  • white snakeroot Ageratina altissima
  • white vervain Verbena urticifolia
  • white wand beardtongue Penstemon tubaeflorus
  • whiteflower leafcup Polymnia canadensis
  • whitemouth dayflower Commelina erecta
  • whitestar Ipomoea lacunosa
  • whitetinge sedge Carex albicans
  • wholeleaf rosinweed Silphium integrifolium
  • whorled milkweed Asclepias verticillata
  • widowsfrill Silene stellata
  • wild comfrey Cynoglossum virginianum
  • wild hydrangea Hydrangea arborescens
  • wild yam Dioscorea villosa
  • willowleaf aster Symphyotrichum praealtum
  • winged lythrum Lythrum alatum
  • winged pigweed Cycloloma atriplicifolium
  • wingstem Verbesina alternifolia
  • wiry panicgrass Panicum flexile
  • witchgrass Panicum capillare
  • woodland lettuce Lactuca floridana
  • woodland sunflower Helianthus divaricatus
  • woolly dutchman's pipe Aristolochia tomentosa
  • yellow giant hyssop Agastache nepetoides
  • yellow water buttercup Ranunculus flabellaris
  • yellowfruit horse-gentian Triosteum angustifolium
  • yellowfruit sedge Carex annectens
  • yellowseed false pimpernel Lindernia dubia
  • zigzag spiderwort Tradescantia subaspera
Also listed as native and introduced here 5

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
  • common reedPhragmites australis
  • hedge false bindweedCalystegia sepium
  • Kentucky bluegrassPoa pratensis

Compared with Indiana

The typical county is the median of the 92 Indiana 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 Indiana
MeasureKnox CountyTypical countyStatewide
Native species 644 494 1,773
Garden-ready natives 285 211 601
Tree 80 — 164
Shrub 18 — 88
Wildflower (forb) 370 — 954
Grass or grass-like 125 — 416
Vine 35 — 74
Fern 16 — 77

Neighboring counties

Counties that share a ZIP code with Knox County.

Look up another ZIP

Matches your ZIP to the county it mostly lies in, then lists the plants recorded as native to your state (Kew’s World Checklist and USDA PLANTS) and recorded in that county by USDA PLANTS.

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 18083), Indiana. 644 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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