Native plants · Idaho

Native plants of Twin Falls County

300 plant species are recorded as native to Idaho in Kew’s World Checklist of Vascular Plants and USDA PLANTS, and recorded in Twin Falls County by USDA PLANTS. 216 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

Twin Falls County, Idaho

Native species: 300 Typical Idaho county: 302 (median of 44 counties)
Garden-ready natives: 216 Typical Idaho county: 211
Share by type (all 300 native species): Percent of the 300 native species in each growth type

Tree 8% (23)
Shrub 11% (33)
Wildflower (forb) 60% (180)
Grass or grass-like 20% (59)
Vine <1% (1)
Fern 1% (4)

Wildflowers make up the largest share of the native list (60%), followed by grasses and grass-like plants (20%).

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 6a to 7a (2023 map).

The native plant list

Garden-ready natives 216

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

Garden-ready native plants of Twin Falls County, Idaho
Plant	Type	Height	Light	Water use	Hardy to
Alberta beardtongue Penstemon albertinus	Wildflower (forb)	2 ft	Sun–part shade	Medium	Zone 10a
alkali buttercup Ranunculus cymbalaria	Wildflower (forb)	1 ft	Shade-tolerant	High	Zone 3b
alkali sacaton Sporobolus airoides	Grass or grass-like	3 ft	Sun	Low	Zone 3b
Alpine Meadow-Foxtail Alopecurus magellanicus	Grass or grass-like	6 in	Sun–part shade	High	Zone 4a
American bistort Polygonum bistortoides	Wildflower (forb)	1.5 ft	Sun	High	Zone 3b
Anderson's larkspur Delphinium andersonii	Wildflower (forb)	2 ft	Shade-tolerant	Low	Zone 5b
annual hairgrass Deschampsia danthonioides	Grass or grass-like	1.5 ft	Sun–part shade	Medium	Zone 12b
antelope bitterbrush Purshia tridentata	Shrub	6 ft	Sun–part shade	Low	Zone 3b
arrowleaf balsamroot Balsamorhiza sagittata	Wildflower (forb)	2 ft	Sun–part shade	Medium	Zone 3b
arumleaf arrowhead Sagittaria cuneata	Wildflower (forb)	2.6 ft	Sun	Medium	Zone 4a
ballhead waterleaf Hydrophyllum capitatum	Wildflower (forb)	1 ft	Shade-tolerant	High	Zone 4b
basalt milkvetch Astragalus filipes	Wildflower (forb)	2 ft	Sun	Low	Zone 5a
basin wildrye Leymus cinereus	Grass or grass-like	5 ft	Sun	High	Zone 3a
big sagebrush Artemisia tridentata	Tree	4 ft	Sun	Medium	Zone 3a
bitter cherry Prunus emarginata	Tree	80 ft	Sun	Medium	Zone 5a
black sagebrush Artemisia nova	Shrub	2 ft	Sun	Low	Zone 5a
blue wildrye Elymus glaucus	Grass or grass-like	3.3 ft	Shade-tolerant	Low	Zone 3b
bluebunch wheatgrass Pseudoroegneria spicata	Grass or grass-like	3 ft	Sun	Low	Zone 3b
Booth's willow Salix boothii	Shrub	24 ft	Shade-tolerant	High	Zone 8b
boxelder Acer negundo	Tree	60 ft	Shade-tolerant	Medium	Zone 2b
broadleaf cattail Typha latifolia	Wildflower (forb)	5 ft	Sun–part shade	High	Zone 3b
broom snakeweed Gutierrezia sarothrae	Shrub	1.5 ft	Sun	Medium	Zone 3b
Brown's peony Paeonia brownii	Wildflower (forb)	1.5 ft	Sun–part shade	Medium	Zone 5a
bud sagebrush Picrothamnus desertorum	Shrub	2 ft	Sun	Low	Zone 3a
bushy bird's beak Cordylanthus ramosus	Wildflower (forb)	1 ft	Sun–part shade	Medium	Zone 12b
California oatgrass Danthonia californica	Grass or grass-like	2 ft	Sun	Medium	Zone 9a
Canada goldenrod Solidago canadensis	Wildflower (forb)	3.5 ft	Sun	Medium	Zone 3a
Canby's biscuitroot Lomatium canbyi	Wildflower (forb)	10 in	Sun	Low	Zone 4b
chokecherry Prunus virginiana	Tree	25 ft	Sun	Medium	Zone 3a
Columbia needlegrass Achnatherum nelsonii	Grass or grass-like	3 ft	Sun	Low	Zone 4b
Columbian monkshood Aconitum columbianum	Wildflower (forb)	5 ft	Sun–part shade	High	Zone 4b
common duckweed Lemna minor	Wildflower (forb)	—	Sun	High	Zone 3b
common sneezeweed Helenium autumnale	Wildflower (forb)	4.9 ft	Sun	Medium	Zone 3a
cous biscuitroot Lomatium cous	Wildflower (forb)	10 in	Sun	Low	Zone 4b
curl-leaf mountain mahogany Cercocarpus ledifolius	Tree	20 ft	Sun–part shade	Low	Zone 2b
cursed buttercup Ranunculus sceleratus	Wildflower (forb)	2 ft	Shade-tolerant	High	Zone 12b
curvepod milkvetch Astragalus curvicarpus	Wildflower (forb)	5 in	Sun	Low	Zone 5a
curvepod yellowcress Rorippa curvisiliqua	Wildflower (forb)	1 ft	Shade-tolerant	High	Zone 12b
darkthroat shootingstar Dodecatheon pulchellum	Wildflower (forb)	2 ft	Sun–part shade	Medium	Zone 4a
desert centaury Centaurium exaltatum	Wildflower (forb)	1.5 ft	Sun	Medium	Zone 12b
devil's beggartick Bidens frondosa	Wildflower (forb)	4 ft	Sun–part shade	Medium	Zone 12a
Douglas' dustymaiden Chaenactis douglasii	Wildflower (forb)	1.6 ft	Sun–part shade	Low	Zone 3b
Douglas' sedge Carex douglasii	Grass or grass-like	1.5 ft	Sun	Medium	Zone 4a
Drummond's willow Salix drummondiana	Shrub	12 ft	Sun–part shade	High	Zone 4b
dwarf purple monkeyflower Mimulus nanus	Wildflower (forb)	6 in	Sun	Low	Zone 10b
fernleaf biscuitroot Lomatium dissectum	Wildflower (forb)	15 ft	Sun–part shade	Low	Zone 8a
field horsetail Equisetum arvense	Fern	11 in	Sun–part shade	High	Zone 3a
fireweed Chamerion angustifolium	Wildflower (forb)	5.5 ft	Sun–part shade	High	Zone 3b
foothill arnica Arnica fulgens	Wildflower (forb)	2 ft	Shade-tolerant	Medium	Zone 4b
foothill deathcamas Zigadenus paniculatus	Wildflower (forb)	1.6 ft	Sun	Medium	Zone 4a
fowl mannagrass Glyceria striata	Grass or grass-like	5.7 ft	Shade-tolerant	Medium	Zone 3b
freckled milkvetch Astragalus lentiginosus	Shrub	1.4 ft	Sun	Low	Zone 4b
Geyer willow Salix geyeriana	Tree	15 ft	Shade-tolerant	High	Zone 3b
giant goldenrod Solidago gigantea	Wildflower (forb)	8.2 ft	Sun–part shade	Medium	Zone 4a
glaucus willowherb Epilobium glaberrimum	Wildflower (forb)	2 ft	Shade-tolerant	Medium	Zone 6b
golden currant Ribes aureum	Shrub	10 ft	Sun–part shade	Low	Zone 3b
granite prickly phlox Linanthus pungens	Wildflower (forb)	2 ft	Shade-tolerant	Low	Zone 4a
greasewood Sarcobatus vermiculatus	Shrub	10 ft	Sun	Low	Zone 3b
Greene's mountain ash Sorbus scopulina	Tree	12 ft	Sun–part shade	Medium	Zone 7a
hardstem bulrush Schoenoplectus acutus	Grass or grass-like	9.8 ft	Sun	High	Zone 3b
heartleaf arnica Arnica cordifolia	Wildflower (forb)	1.5 ft	Shade-tolerant	High	Zone 4b
Hooker's balsamroot Balsamorhiza hookeri	Wildflower (forb)	1 ft	Sun–part shade	Medium	Zone 5b
Idaho fescue Festuca idahoensis	Grass or grass-like	2 ft	Sun–part shade	Medium	Zone 3b
Indian ricegrass Achnatherum hymenoides	Grass or grass-like	2 ft	Sun	Low	Zone 3a
King's sandwort Arenaria kingii	Wildflower (forb)	8 in	Sun	Low	Zone 4b
lambstongue ragwort Senecio integerrimus	Wildflower (forb)	1.1 ft	Sun–part shade	Medium	Zone 3b
largeflower hawksbeard Crepis occidentalis	Wildflower (forb)	11 in	Sun	Low	Zone 5a
largeflower triteleia Triteleia grandiflora	Wildflower (forb)	2 ft	Sun–part shade	Medium	Zone 4a
largeleaf avens Geum macrophyllum	Wildflower (forb)	2 ft	Shade-tolerant	Medium	Zone 4a
leafy pondweed Potamogeton foliosus	Wildflower (forb)	—	Sun	High	Zone 3b
Leiberg's bluegrass Poa leibergii	Grass or grass-like	1.5 ft	Sun	Medium	Zone 5a
Lemmon's needlegrass Achnatherum lemmonii	Grass or grass-like	3 ft	Sun	Low	Zone 4b
Lemmon's willow Salix lemmonii	Shrub	14 ft	Sun–part shade	High	Zone 4b
Letterman's needlegrass Achnatherum lettermanii	Grass or grass-like	2 ft	Sun	Low	Zone 4b
little sagebrush Artemisia arbuscula	Shrub	2 ft	Sun	Low	Zone 3a
littleleaf horsebrush Tetradymia glabrata	Shrub	12 ft	Sun	Low	Zone 6a
littleleaf pussytoes Antennaria microphylla	Wildflower (forb)	1 ft	Sun	Low	Zone 3b
lodgepole pine Pinus contorta	Tree	99 ft	Sun	Medium	Zone 1a
longleaf phlox Phlox longifolia	Wildflower (forb)	1.2 ft	Sun–part shade	Low	Zone 6a
longleaf pondweed Potamogeton nodosus	Wildflower (forb)	—	Sun	High	Zone 3b
longstalk starwort Stellaria longipes	Wildflower (forb)	11 in	Sun–part shade	High	Zone 4a
low pussytoes Antennaria dimorpha	Wildflower (forb)	4 in	Sun–part shade	Low	Zone 3b
Macoun's buttercup Ranunculus macounii	Wildflower (forb)	1 ft	Sun	—	Zone 1a
maiden blue eyed Mary Collinsia parviflora	Wildflower (forb)	1 ft	Shade-tolerant	Medium	Zone 4a
mat muhly Muhlenbergia richardsonis	Grass or grass-like	6 in	Sun	High	Zone 4b
miner's lettuce Claytonia perfoliata	Wildflower (forb)	1 ft	Shade-tolerant	Medium	Zone 12b
Modoc hawksbeard Crepis modocensis	Wildflower (forb)	1.4 ft	Sun	Low	Zone 4b
mule-ears Wyethia amplexicaulis	Wildflower (forb)	2.5 ft	Sun	Medium	Zone 3b
Munro's globemallow Sphaeralcea munroana	Wildflower (forb)	2.5 ft	Sun	Low	Zone 4b
muttongrass Poa fendleriana	Grass or grass-like	2 ft	Sun	Low	Zone 3b
narrowleaf willow Salix exigua	Tree	10 ft	Sun–part shade	High	Zone 3b
needle and thread Hesperostipa comata	Grass or grass-like	3 ft	Sun	Low	Zone 3b
nineleaf biscuitroot Lomatium triternatum	Wildflower (forb)	2.2 ft	Sun–part shade	Medium	Zone 4a
nodding beggartick Bidens cernua	Wildflower (forb)	3.2 ft	Sun–part shade	High	Zone 12a
nodding microseris Microseris nutans	Wildflower (forb)	2 ft	Shade-tolerant	Medium	Zone 4b
northern black currant Ribes hudsonianum	Shrub	5 ft	Sun–part shade	High	Zone 4a
northwestern Indian paintbrush Castilleja angustifolia	Wildflower (forb)	2.5 ft	Shade-tolerant	Medium	Zone 4a
Nuttall's povertyweed Monolepis nuttalliana	Wildflower (forb)	10 in	Sun	Medium	Zone 12a
Nuttall's sunflower Helianthus nuttallii	Wildflower (forb)	10 ft	Sun	Medium	Zone 3b
oceanspray Holodiscus discolor	Shrub	12 ft	Sun	High	Zone 8a
old man's whiskers Geum triflorum	Wildflower (forb)	1.5 ft	Sun–part shade	Medium	Zone 3b
oneflower helianthella Helianthella uniflora	Wildflower (forb)	2 ft	Sun–part shade	Low	Zone 5a
onespike danthonia Danthonia unispicata	Grass or grass-like	10 in	Sun	Low	Zone 4b
oniongrass Melica bulbosa	Grass or grass-like	1.8 ft	Sun–part shade	Low	Zone 3a
orange agoseris Agoseris aurantiaca	Wildflower (forb)	1 ft	Sun	Medium	Zone 4a
Oregon checkerbloom Sidalcea oregana	Wildflower (forb)	4.5 ft	Shade-tolerant	High	Zone 3b
pale agoseris Agoseris glauca	Shrub	1 ft	Sun	Medium	Zone 4a
pale evening primrose Oenothera pallida	Wildflower (forb)	2 ft	Sun	Low	Zone 3b
panicled bulrush Scirpus microcarpus	Grass or grass-like	5.5 ft	Sun	Medium	Zone 3b
peachleaf willow Salix amygdaloides	Tree	60 ft	Sun	High	Zone 4a
Pennsylvania bittercress Cardamine pensylvanica	Wildflower (forb)	1.5 ft	Shade-tolerant	Medium	Zone 4a
plains pricklypear Opuntia polyacantha	Shrub	2 ft	Sun	Low	Zone 4b
poverty rush Juncus tenuis	Grass or grass-like	1.5 ft	Sun–part shade	Medium	Zone 3b
purple milkvetch Astragalus agrestis	Wildflower (forb)	1 ft	Sun	Low	Zone 4a
purple oniongrass Melica spectabilis	Grass or grass-like	2.5 ft	Sun–part shade	Low	Zone 4a
quaking aspen Populus tremuloides	Tree	65 ft	Sun	High	Zone 1a
red elderberry Sambucus racemosa	Tree	18 ft	Sun–part shade	High	Zone 4a
redosier dogwood Cornus sericea	Tree	12 ft	Sun	High	Zone 3b
rice cutgrass Leersia oryzoides	Grass or grass-like	4.9 ft	Sun	High	Zone 4a
Richardson's geranium Geranium richardsonii	Wildflower (forb)	3 ft	Sun–part shade	High	Zone 3b
Rocky Mountain beeplant Cleome serrulata	Wildflower (forb)	3 ft	Sun–part shade	Medium	Zone 12b
Rocky Mountain iris Iris missouriensis	Wildflower (forb)	1 ft	Sun–part shade	High	Zone 4b
Rocky Mountain juniper Juniperus scopulorum	Tree	50 ft	Sun	Low	Zone 3b
rough bentgrass Agrostis scabra	Grass or grass-like	2.5 ft	Sun	Medium	Zone 3b
rough bugleweed Lycopus asper	Wildflower (forb)	2.1 ft	Shade-tolerant	High	Zone 3b
rubber rabbitbrush Ericameria nauseosa	Shrub	4 ft	Sun	Medium	Zone 3b
Rydberg's penstemon Penstemon rydbergii	Wildflower (forb)	3 ft	Sun	Low	Zone 3b
sagebrush buttercup Ranunculus glaberrimus	Wildflower (forb)	6 in	Sun	High	Zone 3a
sand dropseed Sporobolus cryptandrus	Grass or grass-like	3 ft	Sun	Low	Zone 3b
Sandberg bluegrass Poa secunda	Grass or grass-like	1.4 ft	Sun–part shade	Low	Zone 3b
sanddune wallflower Erysimum capitatum	Wildflower (forb)	2.5 ft	Sun	Medium	Zone 4b
Saskatoon serviceberry Amelanchier alnifolia	Tree	15 ft	Sun–part shade	Medium	Zone 1a
scabland penstemon Penstemon deustus	Wildflower (forb)	2 ft	Sun	Low	Zone 4a
scarlet gilia Ipomopsis aggregata	Wildflower (forb)	3 ft	Sun	Low	Zone 5b
Scouler's willow Salix scouleriana	Tree	50 ft	Sun–part shade	High	Zone 6a
scratchgrass Muhlenbergia asperifolia	Grass or grass-like	2 ft	Shade-tolerant	High	Zone 5b
seashore bentgrass Agrostis pallens	Grass or grass-like	2 ft	Sun–part shade	High	Zone 5a
seep monkeyflower Mimulus guttatus	Wildflower (forb)	2.5 ft	Shade-tolerant	High	Zone 3b
shadscale saltbush Atriplex confertifolia	Shrub	3 ft	Sun	Medium	Zone 3b
sharpleaf penstemon Penstemon acuminatus	Wildflower (forb)	2 ft	Sun	Low	Zone 4a
shortawn foxtail Alopecurus aequalis	Grass or grass-like	2.5 ft	Sun–part shade	High	Zone 3b
shortspine horsebrush Tetradymia spinosa	Shrub	3.2 ft	Sun	Low	Zone 4b
showy milkweed Asclepias speciosa	Wildflower (forb)	6 ft	Sun	Medium	Zone 4a
sickle saltbush Atriplex falcata	Shrub	2 ft	Sun–part shade	Low	Zone 3b
Sierra rush Juncus nevadensis	Grass or grass-like	2 ft	Sun–part shade	High	Zone 4a
silky lupine Lupinus sericeus	Wildflower (forb)	6 ft	Sun	Low	Zone 4b
silver sagebrush Artemisia cana	Shrub	5 ft	Sun	Low	Zone 3a
silverleaf phacelia Phacelia hastata	Wildflower (forb)	2 ft	Sun–part shade	Medium	Zone 3b
silverweed cinquefoil Argentina anserina	Wildflower (forb)	6 in	Shade-tolerant	High	Zone 5a
silvery lupine Lupinus argenteus	Wildflower (forb)	1.5 ft	Sun	Low	Zone 3a
skunkbush sumac Rhus trilobata	Shrub	4 ft	Sun–part shade	Low	Zone 2a
slender cinquefoil Potentilla gracilis	Wildflower (forb)	2.4 ft	Sun	Low	Zone 3a
slender hairgrass Deschampsia elongata	Grass or grass-like	3 ft	Sun	Low	Zone 3b
slender wheatgrass Elymus trachycaulus	Grass or grass-like	3 ft	Sun	Medium	Zone 3b
slenderbeak sedge Carex athrostachya	Grass or grass-like	2 ft	Sun–part shade	High	Zone 4a
small camas Camassia quamash	Wildflower (forb)	2.3 ft	Shade-tolerant	High	Zone 4b
small white violet Viola macloskeyi	Wildflower (forb)	6 in	Shade-tolerant	High	Zone 4b
smallwing sedge Carex microptera	Grass or grass-like	2 ft	Sun	High	Zone 4a
smooth horsetail Equisetum laevigatum	Fern	5 ft	Sun	Low	Zone 3b
snowbrush ceanothus Ceanothus velutinus	Tree	10 ft	Sun	Medium	Zone 5a
spike bentgrass Agrostis exarata	Grass or grass-like	3 ft	Sun	Medium	Zone 3b
spike trisetum Trisetum spicatum	Grass or grass-like	1.9 ft	Sun–part shade	Medium	Zone 3b
spineless horsebrush Tetradymia canescens	Shrub	4 ft	Sun	Low	Zone 9a
spiny hopsage Grayia spinosa	Shrub	3 ft	Sun	Low	Zone 4a
spreading phlox Phlox diffusa	Wildflower (forb)	6 in	Shade-tolerant	Low	Zone 6a
squirreltail Elymus elymoides	Grass or grass-like	1.5 ft	Sun	Low	Zone 3a
sticky cinquefoil Potentilla glandulosa	Wildflower (forb)	1.5 ft	Sun–part shade	Low	Zone 4a
sticky currant Ribes viscosissimum	Shrub	3.5 ft	Sun	—	Zone 3b
sticky purple geranium Geranium viscosissimum	Wildflower (forb)	3 ft	Shade-tolerant	Low	Zone 6a
subalpine fir Abies lasiocarpa	Tree	90 ft	Shade-tolerant	Medium	Zone 2a
Suksdorf's monkeyflower Mimulus suksdorfii	Wildflower (forb)	7 in	Shade-tolerant	Medium	Zone 12b
sulphur-flower buckwheat Eriogonum umbellatum	Shrub	1 ft	Sun	Low	Zone 8a
swamp milkweed Asclepias incarnata	Wildflower (forb)	4.9 ft	Sun	High	Zone 3b
swamp smartweed Polygonum hydropiperoides	Wildflower (forb)	—	Sun	Medium	Zone 10b
swordleaf rush Juncus ensifolius	Grass or grass-like	2 ft	Sun–part shade	High	Zone 3b
tailcup lupine Lupinus caudatus	Wildflower (forb)	5 ft	Sun	Low	Zone 4b
tall fringed bluebells Mertensia ciliata	Wildflower (forb)	2 ft	Sun–part shade	High	Zone 5a
tall groundsel Senecio hydrophiloides	Wildflower (forb)	10 in	Shade-tolerant	High	Zone 4b
tapertip hawksbeard Crepis acuminata	Wildflower (forb)	3 ft	Sun–part shade	Low	Zone 3b
tapertip onion Allium acuminatum	Wildflower (forb)	1 ft	Sun	Low	Zone 4b
textile onion Allium textile	Wildflower (forb)	1 ft	Sun–part shade	Medium	Zone 3b
thickspike wheatgrass Elymus lanceolatus	Grass or grass-like	2.3 ft	Sun	Low	Zone 3b
thickstem aster Eurybia integrifolia	Wildflower (forb)	3 ft	Sun	Low	Zone 5a
threadleaf fleabane Erigeron filifolius	Wildflower (forb)	1 ft	Sun	Low	Zone 6a
threadleaf sedge Carex filifolia	Grass or grass-like	1.2 ft	Sun	Low	Zone 3b
threetip sagebrush Artemisia tripartita	Shrub	4 ft	Sun	Low	Zone 3a
Thurber's needlegrass Achnatherum thurberianum	Grass or grass-like	2 ft	Sun	Low	Zone 5a
Tolmie's onion Allium tolmiei	Wildflower (forb)	1 ft	Sun	Medium	Zone 4a
Torrey's rush Juncus torreyi	Grass or grass-like	3.1 ft	Sun	Medium	Zone 3b
tufted evening primrose Oenothera caespitosa	Wildflower (forb)	6 in	Sun	Low	Zone 6a
tufted hairgrass Deschampsia cespitosa	Grass or grass-like	3.4 ft	Sun	Low	Zone 3b
Utah serviceberry Amelanchier utahensis	Tree	15 ft	Sun–part shade	Medium	Zone 4b
water birch Betula occidentalis	Tree	25 ft	Sun–part shade	High	Zone 1a
water knotweed Polygonum amphibium	Wildflower (forb)	1 in	Sun	High	Zone 5a
wavyleaf Indian paintbrush Castilleja applegatei	Wildflower (forb)	1.5 ft	Sun	Low	Zone 4b
wax currant Ribes cereum	Shrub	3 ft	Sun	Low	Zone 5a
western columbine Aquilegia formosa	Wildflower (forb)	3 ft	Shade-tolerant	Medium	Zone 5a
western goldentop Euthamia occidentalis	Wildflower (forb)	6 ft	Sun	Medium	Zone 4b
western juniper Juniperus occidentalis	Tree	33 ft	Sun	Low	Zone 4a
western stoneseed Lithospermum ruderale	Wildflower (forb)	1.5 ft	Sun	Low	Zone 4b
western valerian Valeriana occidentalis	Wildflower (forb)	3 ft	Sun	High	Zone 4b
western water hemlock Cicuta douglasii	Wildflower (forb)	6 ft	Sun	High	Zone 4b
western wheatgrass Pascopyrum smithii	Grass or grass-like	2 ft	Sun	Medium	Zone 3a
western white clematis Clematis ligusticifolia	Vine	1 ft	Sun–part shade	Medium	Zone 3b
white sagebrush Artemisia ludoviciana	Wildflower (forb)	3 ft	Sun	Low	Zone 4a
whitestem gooseberry Ribes inerme	Shrub	8 ft	Shade-tolerant	Medium	Zone 4b
winterfat Krascheninnikovia lanata	Shrub	2 ft	Sun	Low	Zone 2a
Woods' rose Rosa woodsii	Shrub	3 ft	Sun–part shade	Medium	Zone 3a
woolly groundsel Packera cana	Wildflower (forb)	1.5 ft	Sun	Low	Zone 3a
woolly plantain Plantago patagonica	Wildflower (forb)	6 in	Sun	Low	Zone 12b
woollypod milkvetch Astragalus purshii	Wildflower (forb)	7 in	Sun	Low	Zone 4a
yellow fritillary Fritillaria pudica	Wildflower (forb)	1 ft	Sun–part shade	Medium	Zone 12a
yellow owl's-clover Orthocarpus luteus	Wildflower (forb)	1.5 ft	Sun	Low	Zone 12b
yellow rabbitbrush Chrysothamnus viscidiflorus	Shrub	3 ft	Sun	Low	Zone 5a
yellow wildrye Leymus flavescens	Grass or grass-like	3 ft	Sun	Medium	Zone 5b
yellow willow Salix lutea	Tree	16 ft	Sun–part shade	High	Zone 3a

Other native species recorded here 84

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.

American sloughgrass Beckmannia syzigachne
American yellowrocket Barbarea orthoceras
arroyo willow Salix lasiolepis
ballhead ipomopsis Ipomopsis congesta
balsam groundsel Packera paupercula
bearded flatsedge Cyperus squarrosus
bigbract verbena Verbena bracteata
bog yellowcress Rorippa palustris
box knotweed Polygonum buxiforme
brittle bladderfern Cystopteris fragilis
brook cinquefoil Potentilla rivalis
carelessweed Cyclachaena xanthiifolia
Carolina geranium Geranium carolinianum
chairmaker's bulrush Schoenoplectus americanus
clustered broomrape Orobanche fasciculata
cutleaf nightshade Solanum triflorum
desert princesplume Stanleya pinnata
Douglas' knotweed Polygonum douglasii
elkweed Frasera speciosa
false mermaidweed Floerkea proserpinacoides
falsegold groundsel Packera pseudaurea
feathery false lily of the valley Maianthemum racemosum
flatspine bur ragweed Ambrosia acanthicarpa
flatspine stickseed Lappula occidentalis
foxtail barley Hordeum jubatum
Fremont's goosefoot Chenopodium fremontii
fringed willowherb Epilobium ciliatum
giant red Indian paintbrush Castilleja miniata
hairy evening primrose Oenothera villosa
hoary tansyaster Machaeranthera canescens
hooded coralroot Corallorhiza striata
hookedspur violet Viola adunca
lemon scurfpea Psoralidium lanceolatum
lesser wirelettuce Stephanomeria minor
longleaf groundcherry Physalis longifolia
manyflower stickseed Hackelia floribunda
marsh skullcap Scutellaria galericulata
meadow deathcamas Zigadenus venenosus
meadow horsetail Equisetum pratense
Menzies' campion Silene menziesii
Menzies' fiddleneck Amsinckia menziesii
mountain tansymustard Descurainia incana
narrowleaf bur-reed Sparganium angustifolium
narrowleaf goosefoot Chenopodium leptophyllum
narrowleaf minerslettuce Montia linearis
neckweed Veronica peregrina
nodding buckwheat Eriogonum cernuum
nodding chickweed Cerastium nutans
oneflowered broomrape Orobanche uniflora
pale false mannagrass Torreyochloa pallida
pale spikerush Eleocharis macrostachya
Pennsylvania pellitory Parietaria pensylvanica
plains springparsley Cymopterus acaulis
poverty oatgrass Danthonia spicata
povertyweed Iva axillaris
pullup muhly Muhlenbergia filiformis
redwool plantain Plantago eriopoda
Rocky Mountain rush Juncus saximontanus
rosy pussytoes Antennaria rosea
rusty lupine Lupinus pusillus
scentbottle Platanthera dilatata
Scouler's popcornflower Plagiobothrys scouleri
scrambled eggs Corydalis aurea
shaggy fleabane Erigeron pumilus
sidebells wintergreen Orthilia secunda
sixweeks fescue Vulpia octoflora
spiny phlox Phlox hoodii
spotted fritillary Fritillaria atropurpurea
spreading dogbane Apocynum androsaemifolium
starry false lily of the valley Maianthemum stellatum
stream orchid Epipactis gigantea
summer coralroot Corallorhiza maculata
sweetcicely Osmorhiza berteroi
tall annual willowherb Epilobium brachycarpum
tarragon Artemisia dracunculus
threadleaf crowfoot Ranunculus trichophyllus
tiny trumpet Collomia linearis
tower rockcress Arabis glabra
turion duckweed Lemna turionifera
western tansymustard Descurainia pinnata
whitestem blazingstar Mentzelia albicaulis
witchgrass Panicum capillare
woodland draba Draba nemorosa
woolly sedge Carex pellita

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.

biennial wormwoodArtemisia biennis
common pepperweedLepidium densiflorum
Kentucky bluegrassPoa pratensis

Compared with Idaho

The typical county is the median of the 44 Idaho 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, Twin Falls County and Idaho
Measure	Twin Falls County	Typical county	Statewide
Native species	300	302	975
Garden-ready natives	216	211	591
Tree	23	—	65
Shrub	33	—	97
Wildflower (forb)	180	—	552
Grass or grass-like	59	—	206
Vine	1	—	14
Fern	4	—	41

Neighboring counties

Counties that share a ZIP code with Twin Falls County.

Cassia County, ID 274 garden-ready
Gooding County, ID 137 garden-ready
Jerome County, ID 14 garden-ready
Owyhee County, ID 326 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: Twin Falls County (county FIPS 16083), Idaho. 300 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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