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Native plants · Iowa

Native plants of Harrison County

337 plant species are recorded as native to Iowa in Kew’s World Checklist of Vascular Plants and USDA PLANTS, and recorded in Harrison County by USDA PLANTS. 163 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

Harrison County, Iowa

Native species
337 Typical Iowa county: 44 (median of 99 counties)
Garden-ready natives
163 Typical Iowa county: 24
Share by type (all 337 native species)
Percent of the 337 native species in each growth type
Tree 9% (30)
Shrub 4% (12)
Wildflower (forb) 59% (199)
Grass or grass-like 23% (77)
Vine 4% (12)
Fern 2% (7)

Wildflowers make up the largest share of the native list (59%), followed by grasses and grass-like plants (23%).

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 zones 5a to 5b (2023 map).

The native plant list

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

Garden-ready natives 163

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

Garden-ready native plants of Harrison County, Iowa
PlantType HeightLight Water useHardy to
alkali buttercup Ranunculus cymbalaria Wildflower (forb) 1 ft Shade-tolerant High Zone 3b
American basswood Tilia americana Tree 100 ft Shade-tolerant Medium Zone 2b
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 hazelnut Corylus americana Shrub 10 ft Sun–part shade Medium Zone 4a
American licorice Glycyrrhiza lepidota Wildflower (forb) 4 ft Sun–part shade High Zone 3b
American lotus Nelumbo lutea Wildflower (forb) 3 ft Sun High Zone 3b
American red raspberry Rubus idaeus Shrub 6 ft Shade-tolerant — Zone 1a
American vetch Vicia americana Vine 1.3 ft Sun Low Zone 3b
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
awlfruit sedge Carex stipata Grass or grass-like 3.5 ft Shade-tolerant Medium Zone 3b
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 cherry Prunus serotina Tree 80 ft Sun Medium Zone 4a
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
blue grama Bouteloua gracilis Grass or grass-like 1 ft Sun Medium Zone 3a
boxelder Acer negundo Tree 60 ft Shade-tolerant Medium Zone 2b
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
bur oak Quercus macrocarpa Tree 100 ft Sun–part shade Medium Zone 3b
butternut Juglans cinerea Tree 80 ft Sun Medium Zone 4a
Canada germander Teucrium canadense Wildflower (forb) 3.3 ft Sun–part shade High Zone 3a
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
chokecherry Prunus virginiana Tree 25 ft Sun Medium Zone 3a
common blue violet Viola sororia Wildflower (forb) 4 in Sun–part shade High Zone 4b
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 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
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
devil's beggartick Bidens frondosa Wildflower (forb) 4 ft Sun–part shade Medium Zone 12a
dotted blazing star Liatris punctata Wildflower (forb) 2 ft Sun Medium Zone 3a
downy paintedcup Castilleja sessiliflora Wildflower (forb) 1.3 ft Sun Low Zone 3b
eastern cottonwood Populus deltoides Tree 190 ft Sun High Zone 3a
eastern redbud Cercis canadensis Tree 30 ft Shade-tolerant Low Zone 4b
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 horsetail Equisetum arvense Fern 11 in Sun–part shade High Zone 3a
field pussytoes Antennaria neglecta Wildflower (forb) 1 ft Sun Low Zone 3b
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
fragrant flatsedge Cyperus odoratus Grass or grass-like 2 ft Sun Medium Zone 11b
giant goldenrod Solidago gigantea Wildflower (forb) 8.2 ft Sun–part shade Medium Zone 4a
gray goldenrod Solidago nemoralis Wildflower (forb) 2 ft Sun Medium Zone 4a
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
green needlegrass Nassella viridula Grass or grass-like 2 ft Sun Low Zone 3b
hardstem bulrush Schoenoplectus acutus Grass or grass-like 9.8 ft Sun High Zone 3b
honeylocust Gleditsia triacanthos Tree 70 ft Sun Medium Zone 3b
hophornbeam Ostrya virginiana Tree 45 ft Shade-tolerant Low Zone 3b
Illinois bundleflower Desmanthus illinoensis Wildflower (forb) 3 ft Sun Medium Zone 5b
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
Kentucky coffeetree Gymnocladus dioicus Tree 100 ft Sun Medium Zone 4a
knotted rush Juncus nodosus Grass or grass-like 2 ft Sun Medium Zone 4b
leadplant Amorpha canescens Shrub 4 ft Shade-tolerant Low Zone 3b
leafy pondweed Potamogeton foliosus Wildflower (forb) — Sun High Zone 3b
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
Malabar sprangletop Leptochloa fusca Grass or grass-like 3.3 ft Sun High Zone 3a
marsh muhly Muhlenbergia racemosa Grass or grass-like 3 ft Shade-tolerant Medium Zone 3b
Missouri River willow Salix eriocephala Tree 52 ft Shade-tolerant High Zone 3b
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
pale touch-me-not Impatiens pallida Wildflower (forb) 8.2 ft Shade-tolerant Medium Zone 10b
partridge pea Chamaecrista fasciculata Wildflower (forb) 2.4 ft Shade-tolerant Medium Zone 7a
peachleaf willow Salix amygdaloides Tree 60 ft Sun High Zone 4a
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
pinnate prairie coneflower Ratibida pinnata Wildflower (forb) 4 ft Sun Medium Zone 3b
plains muhly Muhlenbergia cuspidata Grass or grass-like 1.4 ft Sun Low Zone 3b
porcupinegrass Hesperostipa spartea Grass or grass-like 4 ft Sun Medium Zone 3b
prairie cordgrass Spartina pectinata Grass or grass-like 8 ft Sun High Zone 3b
prairie fleabane Erigeron strigosus Wildflower (forb) 3 ft Sun Medium Zone 4b
prairie Junegrass Koeleria macrantha Grass or grass-like 1.5 ft Shade-tolerant High Zone 3b
prairie sandreed Calamovilfa longifolia Grass or grass-like 4.5 ft Sun Medium Zone 3b
prairie wedgescale Sphenopholis obtusata Grass or grass-like 3.2 ft Sun–part shade Medium Zone 3a
prairie willow Salix humilis Shrub 10 ft Sun–part shade High Zone 3a
purple locoweed Oxytropis lambertii Wildflower (forb) 1.4 ft Sun Low Zone 3b
purple lovegrass Eragrostis spectabilis Grass or grass-like 11 in Sun Low Zone 3a
purplestem aster Symphyotrichum puniceum Wildflower (forb) 8.1 ft Sun High Zone 3b
rattlesnake fern Botrychium virginianum Fern 1.4 ft Shade-tolerant Medium Zone 3b
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
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
river bulrush Bolboschoenus fluviatilis Grass or grass-like 6.6 ft Sun Medium Zone 3b
riverbank grape Vitis riparia Vine 45 ft Sun–part shade Medium Zone 4a
rock elm Ulmus thomasii Tree 90 ft Sun–part shade High Zone 2b
Rocky Mountain beeplant Cleome serrulata Wildflower (forb) 3 ft Sun–part shade Medium Zone 12b
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
sago pondweed Stuckenia pectinata Wildflower (forb) — Sun High Zone 3b
sand dropseed Sporobolus cryptandrus Grass or grass-like 3 ft Sun Low Zone 3b
sandbar willow Salix interior Tree 30 ft Sun — Zone 1a
sawtooth sunflower Helianthus grosseserratus Wildflower (forb) 5 ft Sun Medium Zone 3a
scarlet globemallow Sphaeralcea coccinea Wildflower (forb) 1.5 ft Sun Low Zone 5a
sideoats grama Bouteloua curtipendula Grass or grass-like 3 ft Sun Medium Zone 3a
silver maple Acer saccharinum Tree 90 ft Sun–part shade Medium Zone 2b
silverweed cinquefoil Argentina anserina Wildflower (forb) 6 in Shade-tolerant High Zone 5a
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
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
spreading yellowcress Rorippa sinuata Wildflower (forb) 1 ft Sun Medium Zone 3b
stiff goldenrod Oligoneuron rigidum Wildflower (forb) 3.6 ft Sun–part shade Medium Zone 3a
strawcolored flatsedge Cyperus strigosus Grass or grass-like 3.2 ft Sun Medium Zone 4a
swamp smartweed Polygonum hydropiperoides Wildflower (forb) — Sun Medium Zone 10b
sweet woodreed Cinna arundinacea Grass or grass-like 4.9 ft Shade-tolerant Low Zone 4a
switchgrass Panicum virgatum Grass or grass-like 5 ft Sun Medium Zone 3a
tall cinquefoil Potentilla arguta Wildflower (forb) 3 ft Sun–part shade Medium Zone 3b
tapertip flatsedge Cyperus acuminatus Grass or grass-like 1.3 ft Sun–part shade High Zone 3b
tapertip rush Juncus acuminatus Grass or grass-like 3 ft Sun–part shade High Zone 4a
teal lovegrass Eragrostis hypnoides Grass or grass-like 4 in Sun High Zone 3b
tenpetal blazingstar Mentzelia decapetala Wildflower (forb) 3.5 ft Sun Medium Zone 3b
threelobe beggarticks Bidens tripartita Wildflower (forb) 3.5 ft Sun–part shade High Zone 12a
toad rush Juncus bufonius Grass or grass-like 1 ft Sun Medium Zone 12a
Torrey's rush Juncus torreyi Grass or grass-like 3.1 ft Sun Medium Zone 3b
troublesome sedge Carex molesta Grass or grass-like 3 ft Sun Medium Zone 3b
upright sedge Carex stricta Grass or grass-like 4.2 ft Shade-tolerant Medium Zone 3b
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 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
western wheatgrass Pascopyrum smithii Grass or grass-like 2 ft Sun Medium Zone 3a
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 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
white prairie clover Dalea candida Wildflower (forb) 2 ft Sun–part shade Medium Zone 3b
white sagebrush Artemisia ludoviciana Wildflower (forb) 3 ft Sun Low Zone 4a
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
wirestem muhly Muhlenbergia frondosa Grass or grass-like 2 ft Shade-tolerant Medium Zone 3b
woolly plantain Plantago patagonica Wildflower (forb) 6 in Sun Low Zone 12b
zigzag goldenrod Solidago flexicaulis Wildflower (forb) 3 ft Sun–part shade Medium Zone 5b

Other native species recorded here 174

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.

  • amberique-bean Strophostyles helvola
  • American bugseed Corispermum americanum
  • American burnweed Erechtites hieraciifolius
  • American hogpeanut Amphicarpaea bracteata
  • aromatic aster Symphyotrichum oblongifolium
  • arrowhead rattlebox Crotalaria sagittalis
  • bald spikerush Eleocharis erythropoda
  • Baldwin's ironweed Vernonia baldwinii
  • bastard toadflax Comandra umbellata
  • bearded flatsedge Cyperus squarrosus
  • big devils beggartick Bidens vulgata
  • bigbract verbena Verbena bracteata
  • bigseed alfalfa dodder Cuscuta indecora
  • blackseed plantain Plantago rugelii
  • blue skullcap Scutellaria lateriflora
  • bog yellowcress Rorippa palustris
  • bottomland aster Symphyotrichum ontarionis
  • brittle bladderfern Cystopteris fragilis
  • buffalobur nightshade Solanum rostratum
  • bushy knotweed Polygonum ramosissimum
  • Canada lettuce Lactuca canadensis
  • Canadian anemone Anemone canadensis
  • carelessweed Cyclachaena xanthiifolia
  • Carolina horsenettle Solanum carolinense
  • Carolina larkspur Delphinium carolinianum
  • clustered blacksnakeroot Sanicula odorata
  • common bladderwort Utricularia macrorhiza
  • common milkweed Asclepias syriaca
  • common moonseed Menispermum canadense
  • common pricklyash Zanthoxylum americanum
  • common threeseed mercury Acalypha rhomboidea
  • common yellow oxalis Oxalis stricta
  • compassplant Silphium laciniatum
  • Cuman ragweed Ambrosia psilostachya
  • curlycup gumweed Grindelia squarrosa
  • curlytop knotweed Polygonum lapathifolium
  • desert goosefoot Chenopodium pratericola
  • diamond-flowers Stenaria nigricans
  • downy hawthorn Crataegus mollis
  • downy phlox Phlox pilosa
  • Dudley's rush Juncus dudleyi
  • eastern bottlebrush grass Elymus hystrix
  • eastern poison ivy Toxicodendron radicans
  • Equisetum ×ferrissii Equisetum ×ferrissii
  • fall phlox Phlox paniculata
  • fall rosette grass Dichanthelium wilcoxianum
  • fetid marigold Dyssodia papposa
  • feverwort Triosteum perfoliatum
  • fire on the mountain Euphorbia cyathophora
  • flatspine stickseed Lappula occidentalis
  • flowering spurge Euphorbia corollata
  • fourflower yellow loosestrife Lysimachia quadriflora
  • foxtail barley Hordeum jubatum
  • foxtail prairie clover Dalea leporina
  • golden zizia Zizia aurea
  • great blue lobelia Lobelia siphilitica
  • great ragweed Ambrosia trifida
  • green carpetweed Mollugo verticillata
  • green comet milkweed Asclepias viridiflora
  • grooved flax Linum sulcatum
  • groovestem Indian plantain Arnoglossum plantagineum
  • groundplum milkvetch Astragalus crassicarpus
  • hairy hedgenettle Stachys pilosa
  • hairy wildrye Elymus villosus
  • heartleaf four o'clock Mirabilis nyctaginea
  • Heller's rosette grass Dichanthelium oligosanthes
  • hoary puccoon Lithospermum canescens
  • hoary ticktrefoil Desmodium canescens
  • hoary verbena Verbena stricta
  • hooded arrowhead Sagittaria calycina
  • husk tomato Physalis pubescens
  • Jersey tea Ceanothus herbaceus
  • lacy tansyaster Machaeranthera pinnatifida
  • lanceleaf buckthorn Rhamnus lanceolata
  • lanceleaf fogfruit Phyla lanceolata
  • lanceleaf sage Salvia reflexa
  • large beardtongue Penstemon grandiflorus
  • large Indian breadroot Pediomelum esculentum
  • largebracted plantain Plantago aristata
  • lateflowering thoroughwort Eupatorium serotinum
  • Laxmann's milkvetch Astragalus laxmannii
  • leathery knotweed Polygonum achoreum
  • limber honeysuckle Lonicera dioica
  • longbract spiderwort Tradescantia bracteata
  • longleaf groundcherry Physalis longifolia
  • longstyle sweetroot Osmorhiza longistylis
  • lowland bladderfern Cystopteris protrusa
  • lowland yellow loosestrife Lysimachia hybrida
  • mapleleaf goosefoot Chenopodium simplex
  • mat sandbur Cenchrus longispinus
  • matted sandmat Chamaesyce serpens
  • Maximilian sunflower Helianthus maximiliani
  • Mead's sedge Carex meadii
  • meadow garlic Allium canadense
  • Missouri gooseberry Ribes missouriense
  • narrowleaf stoneseed Lithospermum incisum
  • neckweed Veronica peregrina
  • northern bog violet Viola nephrophylla
  • northern bugleweed Lycopus uniflorus
  • northern green rush Juncus alpinoarticulatus
  • northern slender lady's tresses Spiranthes lacera
  • Norwegian cinquefoil Potentilla norvegica
  • Nuttall's sensitive-briar Mimosa nuttallii
  • obedient plant Physostegia virginiana
  • oneseed bur cucumber Sicyos angulatus
  • pale dock Rumex altissimus
  • pale spikerush Eleocharis macrostachya
  • palespike lobelia Lobelia spicata
  • Paradox cinquefoil Potentilla paradoxa
  • Pennsylvania sedge Carex pensylvanica
  • pitseed goosefoot Chenopodium berlandieri
  • poverty dropseed Sporobolus vaginiflorus
  • prairie blue-eyed grass Sisyrinchium campestre
  • prairie false dandelion Nothocalais cuspidata
  • prairie groundsel Packera plattensis
  • prairie ironweed Vernonia fasciculata
  • prairie rose Rosa arkansana
  • prairie threeawn Aristida oligantha
  • prairie violet Viola pedatifida
  • puffsheath dropseed Sporobolus neglectus
  • purplerocket Iodanthus pinnatifidus
  • red columbine Aquilegia canadensis
  • redwhisker clammyweed Polanisia dodecandra
  • ribseed sandmat Chamaesyce glyptosperma
  • rough barnyardgrass Echinochloa muricata
  • rough false pennyroyal Hedeoma hispida
  • rough rattlesnakeroot Prenanthes aspera
  • rush skeletonplant Lygodesmia juncea
  • scarlet beeblossom Oenothera suffrutescens
  • Schweinitz's flatsedge Cyperus schweinitzii
  • shortbeak sedge Carex brevior
  • silverleaf Indian breadroot Pediomelum argophyllum
  • sixangle spurge Euphorbia hexagona
  • sixweeks fescue Vulpia octoflora
  • sleepy silene Silene antirrhina
  • slender wedgescale Sphenopholis intermedia
  • slender yellow woodsorrel Oxalis dillenii
  • slenderleaf false foxglove Agalinis tenuifolia
  • smallflower fumewort Corydalis micrantha
  • smartweed dodder Cuscuta polygonorum
  • smooth rose Rosa blanda
  • smooth Solomon's seal Polygonatum biflorum
  • snow on the mountain Euphorbia marginata
  • soft-hair marbleseed Onosmodium bejariense
  • spotted sandmat Chamaesyce maculata
  • stiff sunflower Helianthus pauciflorus
  • stiffstem flax Linum rigidum
  • swamp verbena Verbena hastata
  • tall blazing star Liatris aspera
  • tall thistle Cirsium altissimum
  • tarragon Artemisia dracunculus
  • Texas goldentop Euthamia gymnospermoides
  • thin paspalum Paspalum setaceum
  • toothed spurge Euphorbia dentata
  • tufted lovegrass Eragrostis pectinacea
  • upright burhead Echinodorus berteroi
  • velvetweed Oenothera curtiflora
  • Virginia groundcherry Physalis virginiana
  • Virginia pepperweed Lepidium virginicum
  • Virginia strawberry Fragaria virginiana
  • walking fern Asplenium rhizophyllum
  • warty spurge Euphorbia spathulata
  • western silver aster Symphyotrichum sericeum
  • western tansymustard Descurainia pinnata
  • white heath aster Symphyotrichum ericoides
  • white snakeroot Ageratina altissima
  • white vervain Verbena urticifolia
  • whitehair rosette grass Dichanthelium villosissimum
  • whorled milkweed Asclepias verticillata
  • whorled milkwort Polygala verticillata
  • winged lythrum Lythrum alatum
  • wingstem Verbesina alternifolia
  • witchgrass Panicum capillare
  • 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
  • Kentucky bluegrassPoa pratensis

Compared with Iowa

The typical county is the median of the 99 Iowa 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, Harrison County and Iowa
MeasureHarrison CountyTypical countyStatewide
Native species 337 44 1,374
Garden-ready natives 163 24 496
Tree 30 — 110
Shrub 12 — 72
Wildflower (forb) 199 — 779
Grass or grass-like 77 — 298
Vine 12 — 55
Fern 7 — 60

Neighboring counties

Counties that share a ZIP code with Harrison 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
Harrison County (county FIPS 19085), Iowa. 337 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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