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Native plants · California

Native plants of San Luis Obispo County

329 plant species are recorded as native to California in Kew’s World Checklist of Vascular Plants and USDA PLANTS, and recorded in San Luis Obispo County by USDA PLANTS. 217 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

San Luis Obispo County, California

Native species
329 Typical California county: 333 (median of 58 counties)
Garden-ready natives
217 Typical California county: 239
Share by type (all 329 native species)
Percent of the 329 native species in each growth type
Tree 13% (43)
Shrub 13% (42)
Wildflower (forb) 48% (159)
Grass or grass-like 22% (72)
Vine 2% (5)
Fern 2% (8)

Wildflowers make up the largest share of the native list (48%), followed by grasses and grass-like plants (22%).

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 8b to 10a (2023 map).

The native plant list

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

Garden-ready natives 217

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

Garden-ready native plants of San Luis Obispo County, California
PlantType HeightLight Water useHardy to
Alaska brome Bromus sitchensis Grass or grass-like 5 ft Shade-tolerant Low Zone 5b
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
American dunegrass Leymus mollis Grass or grass-like 4 ft Sun Medium Zone 8a
American licorice Glycyrrhiza lepidota Wildflower (forb) 4 ft Sun–part shade High Zone 3b
American speedwell Veronica americana Wildflower (forb) 10 in Shade-tolerant High Zone 3b
American vetch Vicia americana Vine 1.3 ft Sun Low Zone 3b
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
awl-leaf lilaea Lilaea scilloides Grass or grass-like 10 in Shade-tolerant High Zone 12b
beaked spikerush Eleocharis rostellata Grass or grass-like 3 ft Sun High Zone 4b
beardless wildrye Leymus triticoides Grass or grass-like 3 ft Sun High Zone 3a
big deervetch Lotus crassifolius Wildflower (forb) 3.5 ft Sun Medium Zone 7a
big sagebrush Artemisia tridentata Tree 4 ft Sun Medium Zone 3a
big saltbush Atriplex lentiformis Shrub 10 ft Sun Low Zone 8a
bigberry manzanita Arctostaphylos glauca Tree 18 ft Sun–part shade Low Zone 8b
bigflower agoseris Agoseris grandiflora Wildflower (forb) 1.8 ft Sun Medium Zone 6a
bigleaf maple Acer macrophyllum Tree 60 ft Sun–part shade Medium Zone 6a
bigseed biscuitroot Lomatium macrocarpum Wildflower (forb) 6 in Sun Low Zone 4b
Bishop pine Pinus muricata Tree 90 ft Shade-tolerant Medium Zone 9a
bitter cherry Prunus emarginata Tree 80 ft Sun Medium Zone 5a
blue oak Quercus douglasii Tree 60 ft Sun Low Zone 8a
blue wildrye Elymus glaucus Grass or grass-like 3.3 ft Shade-tolerant Low Zone 3b
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
broadleaf lupine Lupinus latifolius Wildflower (forb) 25 ft Shade-tolerant High Zone 5b
buckbrush Ceanothus cuneatus Shrub 11 ft Sun Medium Zone 6a
bunchleaf penstemon Penstemon heterophyllus Wildflower (forb) 2 ft Sun Medium Zone 9a
California black oak Quercus kelloggii Tree 85 ft Sun Medium Zone 7a
California blackberry Rubus ursinus Shrub 2 ft Sun Medium Zone 8a
California brome Bromus carinatus Grass or grass-like 4 ft Sun Low Zone 9a
California buckeye Aesculus californica Tree 25 ft Sun–part shade Medium Zone 7b
California buckthorn Frangula californica Tree 5 ft Sun Medium Zone 8a
California bulrush Schoenoplectus californicus Grass or grass-like 6.6 ft Sun High Zone 9a
California fescue Festuca californica Grass or grass-like 4 ft Sun Medium Zone 8a
California flannelbush Fremontodendron californicum Tree 10 ft Sun Low Zone 9b
California foothill pine Pinus sabiniana Tree 80 ft Sun Low Zone 8b
California huckleberry Vaccinium ovatum Shrub 8 ft Shade-tolerant Low Zone 8a
California laurel Umbellularia californica Tree 80 ft Shade-tolerant High Zone 6a
California live oak Quercus agrifolia Tree 70 ft Sun Medium Zone 8a
California melicgrass Melica californica Grass or grass-like 4 ft Sun–part shade Low Zone 8a
California oatgrass Danthonia californica Grass or grass-like 2 ft Sun Medium Zone 9a
California poppy Eschscholzia californica Wildflower (forb) 1.2 ft Sun–part shade Low Zone 8a
California sycamore Platanus racemosa Tree 75 ft Sun Medium Zone 8a
California wax myrtle Morella californica Tree 33 ft Sun Medium Zone 9b
California wildrose Rosa californica Shrub 10 ft Sun–part shade High Zone 8a
California yerba santa Eriodictyon californicum Shrub 8 ft Sun Low Zone 7a
Canada goldenrod Solidago canadensis Wildflower (forb) 3.5 ft Sun Medium Zone 3a
Canadian horseweed Conyza canadensis Wildflower (forb) 5 ft Sun Medium Zone 12b
Canadian waterweed Elodea canadensis Wildflower (forb) — Sun High Zone 4a
canyon live oak Quercus chrysolepis Tree 90 ft Shade-tolerant Medium Zone 8b
cattle saltbush Atriplex polycarpa Shrub 6 ft Sun Medium Zone 8a
chamise Adenostoma fasciculatum Shrub 10 ft Sun Medium Zone 10b
chaparral yucca Hesperoyucca whipplei Shrub 4 ft Sun Low Zone 8a
chokecherry Prunus virginiana Tree 25 ft Sun Medium Zone 3a
clustered field sedge Carex praegracilis Grass or grass-like 2 ft Sun–part shade Medium Zone 3b
coastal sage scrub oak Quercus dumosa Tree 9 ft Sun Low Zone 9b
Colorado four o'clock Mirabilis multiflora Wildflower (forb) 2 ft Sun Low Zone 5b
Columbia brome Bromus vulgaris Grass or grass-like 1 ft Shade-tolerant Low Zone 5a
common cowparsnip Heracleum maximum Wildflower (forb) 8 ft Sun High Zone 3b
common duckweed Lemna minor Wildflower (forb) — Sun High Zone 3b
common maidenhair Adiantum capillus-veneris Fern 1.7 ft Shade-tolerant High Zone 4a
common reed Phragmites australis Shrub 13 ft Sun Medium Zone 3b
common rush Juncus effusus Grass or grass-like 6.6 ft Sun Medium Zone 3b
common snowberry Symphoricarpos albus Shrub 3 ft Sun Medium Zone 3b
common spikerush Eleocharis palustris Grass or grass-like 1.3 ft Sun High Zone 3b
common sunflower Helianthus annuus Wildflower (forb) 9 ft Sun Medium Zone 12b
coon's tail Ceratophyllum demersum Wildflower (forb) — Sun–part shade High Zone 3b
cosmopolitan bulrush Bolboschoenus maritimus Grass or grass-like 3.2 ft Sun Medium Zone 5a
Coulter pine Pinus coulteri Tree 80 ft Sun Medium Zone 8b
cows clover Trifolium wormskioldii Wildflower (forb) 3.5 ft Sun–part shade Medium Zone 4b
coyotebrush Baccharis pilularis Shrub 10 ft Sun Low Zone 9b
curvepod yellowcress Rorippa curvisiliqua Wildflower (forb) 1 ft Shade-tolerant High Zone 12b
deerbrush Ceanothus integerrimus Shrub 13 ft Sun Low Zone 6a
deergrass Muhlenbergia rigens Grass or grass-like 4.5 ft Sun–part shade Low Zone 9b
desert almond Prunus fasciculata Shrub 6 ft Sun Low Zone 8b
desert bitterbrush Purshia glandulosa Shrub 5 ft Sun Low Zone 6a
desert ceanothus Ceanothus greggii Shrub 7 ft Sun Low Zone 6a
desert centaury Centaurium exaltatum Wildflower (forb) 1.5 ft Sun Medium Zone 12b
desert needlegrass Achnatherum speciosum Grass or grass-like 2 ft Sun Low Zone 6a
dotted smartweed Polygonum punctatum Wildflower (forb) 3.2 ft Sun Medium Zone 10b
Douglas-fir Pseudotsuga menziesii Tree 200 ft Sun–part shade Medium Zone 4a
Douglas' sedge Carex douglasii Grass or grass-like 1.5 ft Sun Medium Zone 4a
dwarf rose Rosa gymnocarpa Shrub 3 ft Shade-tolerant Medium Zone 5b
dwarf spikerush Eleocharis parvula Grass or grass-like 1.2 ft Sun Medium Zone 3b
Eastern Mojave buckwheat Eriogonum fasciculatum Shrub 3 ft Sun Low Zone 8a
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
foothill needlegrass Nassella lepida Grass or grass-like 3 ft Sun Low Zone 9a
fourwing saltbush Atriplex canescens Shrub 4 ft Sun Medium Zone 3a
freckled milkvetch Astragalus lentiginosus Shrub 1.4 ft Sun Low Zone 4b
Fremont cottonwood Populus fremontii Tree 90 ft Sun High Zone 6a
Gardner's yampah Perideridia gairdneri Wildflower (forb) 4 ft Shade-tolerant High Zone 5b
giant chinquapin Chrysolepis chrysophylla Tree 100 ft Shade-tolerant Medium Zone 4a
giant wildrye Leymus condensatus Grass or grass-like 8.5 ft Sun High Zone 3b
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
greenleaf fescue Festuca viridula Grass or grass-like 2.5 ft Sun–part shade Medium Zone 4a
hardstem bulrush Schoenoplectus acutus Grass or grass-like 9.8 ft Sun High Zone 3b
hollyleaf cherry Prunus ilicifolia Tree 40 ft Sun Medium Zone 10b
hooded lady's tresses Spiranthes romanzoffiana Wildflower (forb) 2.5 ft Sun–part shade High Zone 3b
Hooker's evening primrose Oenothera elata Wildflower (forb) 5 ft Sun High Zone 5a
Indian plum Oemleria cerasiformis Tree 5 ft Sun–part shade — Zone 10a
Indian ricegrass Achnatherum hymenoides Grass or grass-like 2 ft Sun Low Zone 3a
Indianhemp Apocynum cannabinum Wildflower (forb) 3.3 ft Sun–part shade High Zone 3a
knotgrass Paspalum distichum Grass or grass-like 11 in Sun High Zone 6a
lacy phacelia Phacelia tanacetifolia Wildflower (forb) 4 ft Sun Medium Zone 12b
largeflower linanthus Leptosiphon grandiflorus Wildflower (forb) 2 ft Sun Medium Zone 12b
leafy pondweed Potamogeton foliosus Wildflower (forb) — Sun High Zone 3b
Lewis flax Linum lewisii Wildflower (forb) 2.5 ft Sun Medium Zone 3b
little western bittercress Cardamine oligosperma Wildflower (forb) 1.7 ft Shade-tolerant Medium Zone 5a
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
meadow barley Hordeum brachyantherum Grass or grass-like 2 ft Sun Medium Zone 3a
Mexican rush Juncus mexicanus Grass or grass-like 10 in Sun Medium Zone 5b
miner's lettuce Claytonia perfoliata Wildflower (forb) 1 ft Shade-tolerant Medium Zone 12b
Missouri gourd Cucurbita foetidissima Vine 1 ft Sun Low Zone 5a
Monterey pine Pinus radiata Tree 120 ft Sun–part shade High Zone 9b
mormon tea Ephedra viridis Shrub 3 ft Sun–part shade Low Zone 5b
mountain brome Bromus marginatus Grass or grass-like 4 ft Sun High Zone 4b
mule-fat Baccharis salicifolia Shrub 10 ft Sun Medium Zone 7a
narrowleaf willow Salix exigua Tree 10 ft Sun–part shade High Zone 3b
needle spikerush Eleocharis acicularis Grass or grass-like 8 in Sun Medium Zone 5a
nettleleaf giant hyssop Agastache urticifolia Wildflower (forb) 5 ft Sun–part shade Medium Zone 4a
nodding needlegrass Nassella cernua Grass or grass-like 2.6 ft Sun Low Zone 9a
Nuttall's povertyweed Monolepis nuttalliana Wildflower (forb) 10 in Sun Medium Zone 12a
oceanspray Holodiscus discolor Shrub 12 ft Sun High Zone 8a
Oregon white oak Quercus garryana Tree 80 ft Sun Low Zone 4a
Pacific aster Symphyotrichum chilense Wildflower (forb) 3.5 ft Sun–part shade Medium Zone 4b
Pacific madrone Arbutus menziesii Tree 80 ft Sun–part shade Low Zone 8b
Pacific ninebark Physocarpus capitatus Shrub 8 ft Sun Low Zone 4a
panicled bulrush Scirpus microcarpus Grass or grass-like 5.5 ft Sun Medium Zone 3b
Philadelphia fleabane Erigeron philadelphicus Wildflower (forb) 2.8 ft Sun–part shade Medium Zone 4b
pinegrass Calamagrostis rubescens Grass or grass-like 3 ft Shade-tolerant Medium Zone 4b
pointleaf manzanita Arctostaphylos pungens Shrub 12 ft Sun–part shade Low Zone 9b
ponderosa pine Pinus ponderosa Tree 223 ft Sun Medium Zone 3b
prairie Junegrass Koeleria macrantha Grass or grass-like 1.5 ft Shade-tolerant High Zone 3b
purple needlegrass Nassella pulchra Grass or grass-like 3 ft Sun–part shade Medium Zone 8b
red alder Alnus rubra Tree 90 ft Sun High Zone 5a
redberry buckthorn Rhamnus crocea Tree 5 ft Sun Low Zone 9b
redflower currant Ribes sanguineum Shrub 12 ft Sun–part shade Medium Zone 8a
redosier dogwood Cornus sericea Tree 12 ft Sun High Zone 3b
redroot flatsedge Cyperus erythrorhizos Grass or grass-like 2.5 ft Sun Medium Zone 11a
redwood Sequoia sempervirens Tree 250 ft Shade-tolerant Medium Zone 8a
rockloving erigeron Erigeron petrophilus Wildflower (forb) 1 ft Shade-tolerant Low Zone 8a
rubber rabbitbrush Ericameria nauseosa Shrub 4 ft Sun Medium Zone 3b
sago pondweed Stuckenia pectinata Wildflower (forb) — Sun High Zone 3b
salal Gaultheria shallon Shrub 6 ft Shade-tolerant High Zone 8a
salt heliotrope Heliotropium curassavicum Wildflower (forb) 1.2 ft Sun Medium Zone 4b
saltgrass Distichlis spicata Grass or grass-like 1.1 ft Sun Medium Zone 3b
saltmarsh bird's-beak Cordylanthus maritimus Wildflower (forb) 1.7 ft Sun Medium Zone 8a
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
scarlet monkeyflower Mimulus cardinalis Wildflower (forb) 2.5 ft Shade-tolerant High Zone 4b
scratchgrass Muhlenbergia asperifolia Grass or grass-like 2 ft Shade-tolerant High Zone 5b
sea milkwort Glaux maritima Wildflower (forb) 11 in Sun High Zone 4a
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
shiny chickweed Stellaria nitens Wildflower (forb) 10 in Shade-tolerant Medium Zone 12a
Sierra gooseberry Ribes roezlii Shrub 5 ft Sun–part shade Low Zone 4b
silver buffaloberry Shepherdia argentea Tree 18 ft Sun–part shade Medium Zone 3b
silverweed cinquefoil Argentina anserina Wildflower (forb) 6 in Shade-tolerant High Zone 5a
singleleaf pinyon Pinus monophylla Tree 50 ft Sun Low Zone 5a
Sitka willow Salix sitchensis Tree 23 ft Sun High Zone 5b
skunkbush sumac Rhus trilobata Shrub 4 ft Sun–part shade Low Zone 2a
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
slough sedge Carex obnupta Grass or grass-like 3 ft Sun–part shade High Zone 7a
smallflower melicgrass Melica imperfecta Grass or grass-like 3.2 ft Sun Low Zone 10a
smooth horsetail Equisetum laevigatum Fern 5 ft Sun Low Zone 3b
southern waternymph Najas guadalupensis Wildflower (forb) 1 ft Sun High Zone 3b
spike bentgrass Agrostis exarata Grass or grass-like 3 ft Sun Medium Zone 3b
spiny hopsage Grayia spinosa Shrub 3 ft Sun Low Zone 4a
spreading alkaliweed Cressa truxillensis Wildflower (forb) 10 in Sun Medium Zone 6a
squirreltail Elymus elymoides Grass or grass-like 1.5 ft Sun Low Zone 3a
star duckweed Lemna trisulca Wildflower (forb) 4 in Sun High Zone 3b
sticky cinquefoil Potentilla glandulosa Wildflower (forb) 1.5 ft Sun–part shade Low Zone 4a
sturdy bulrush Bolboschoenus robustus Grass or grass-like 4.9 ft Sun High Zone 8a
tall trisetum Trisetum canescens Grass or grass-like 3.5 ft Sun–part shade Medium Zone 4a
tanoak Notholithocarpus densiflorus Tree 125 ft Shade-tolerant Medium Zone 8a
tarweed fiddleneck Amsinckia lycopsoides Wildflower (forb) 3 ft Sun Low Zone 4b
thimbleberry Rubus parviflorus Shrub 4 ft Sun–part shade High Zone 4b
threepetal bedstraw Galium trifidum Vine 10 in Sun–part shade High Zone 3b
thrift seapink Armeria maritima Wildflower (forb) 11 in Sun Medium Zone 4b
tinker's penny Hypericum anagalloides Wildflower (forb) 10 in Sun–part shade High Zone 12a
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
tufted hairgrass Deschampsia cespitosa Grass or grass-like 3.4 ft Sun Low Zone 3b
turkey tangle fogfruit Phyla nodiflora Wildflower (forb) 2 in Sun–part shade Low Zone 5b
twinberry honeysuckle Lonicera involucrata Shrub 10 ft Shade-tolerant High Zone 3a
twoheaded water-starwort Callitriche heterophylla Wildflower (forb) — Sun High Zone 4a
Utah serviceberry Amelanchier utahensis Tree 15 ft Sun–part shade Medium Zone 4b
valdivia duckweed Lemna valdiviana Wildflower (forb) 1 in Sun High Zone 4a
valley oak Quercus lobata Tree 100 ft Sun Medium Zone 8a
Virginia glasswort Salicornia depressa Wildflower (forb) 1 ft Sun Medium Zone 8b
wartleaf ceanothus Ceanothus papillosus Shrub 16 ft Sun–part shade Low Zone 9b
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
western columbine Aquilegia formosa Wildflower (forb) 3 ft Shade-tolerant Medium Zone 5a
western fescue Festuca occidentalis Grass or grass-like 3 ft Shade-tolerant Low Zone 3a
western goldentop Euthamia occidentalis Wildflower (forb) 6 ft Sun Medium Zone 4b
western pearly everlasting Anaphalis margaritacea Wildflower (forb) 3 ft Sun–part shade Medium Zone 3a
western swordfern Polystichum munitum Fern 3.5 ft Shade-tolerant High Zone 4a
western water hemlock Cicuta douglasii Wildflower (forb) 6 ft Sun High Zone 4b
western white clematis Clematis ligusticifolia Vine 1 ft Sun–part shade Medium Zone 3b
white alder Alnus rhombifolia Tree 65 ft Shade-tolerant High Zone 5a
white hawkweed Hieracium albiflorum Wildflower (forb) 3 ft Sun–part shade Low Zone 4a
widgeongrass Ruppia maritima Wildflower (forb) 2 in Sun High Zone 7a
winterfat Krascheninnikovia lanata Shrub 2 ft Sun Low Zone 2a
woodrush sedge Carex luzulina Grass or grass-like 2 ft Sun High Zone 4a
yellow bush lupine Lupinus arboreus Shrub 6 ft Sun Low Zone 9b
yerba mansa Anemopsis californica Wildflower (forb) 1.5 ft Sun High Zone 9b

Other native species recorded here 112

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.

  • Aleutian maidenhair Adiantum aleuticum
  • American bird's-foot trefoil Lotus unifoliolatus
  • American black nightshade Solanum americanum
  • American pillwort Pilularia americana
  • American wild carrot Daucus pusillus
  • American yellowrocket Barbarea orthoceras
  • arroyo willow Salix lasiolepis
  • bigbract verbena Verbena bracteata
  • bladderpod spiderflower Cleome isomeris
  • bog yellowcress Rorippa palustris
  • brittle bladderfern Cystopteris fragilis
  • brook cinquefoil Potentilla rivalis
  • Canada toadflax Nuttallanthus canadensis
  • carelessweed Amaranthus palmeri
  • Carolina canarygrass Phalaris caroliniana
  • Carolina geranium Geranium carolinianum
  • chaffweed Anagallis minima
  • chairmaker's bulrush Schoenoplectus americanus
  • clustered broomrape Orobanche fasciculata
  • coast tarweed Madia sativa
  • Columbian watermeal Wolffia columbiana
  • cottonbatting plant Pseudognaphalium stramineum
  • Cuman ragweed Ambrosia psilostachya
  • curlytop knotweed Polygonum lapathifolium
  • cutleaf groundcherry Physalis angulata
  • desert goosefoot Chenopodium pratericola
  • desert princesplume Stanleya pinnata
  • ditch rabbitsfoot grass Polypogon interruptus
  • Douglas' knotweed Polygonum douglasii
  • Equisetum ×ferrissii Equisetum ×ferrissii
  • feather fingergrass Chloris virgata
  • feathery false lily of the valley Maianthemum racemosum
  • flatspine bur ragweed Ambrosia acanthicarpa
  • floating marshpennywort Hydrocotyle ranunculoides
  • foxtail barley Hordeum jubatum
  • fringed willowherb Epilobium ciliatum
  • giant red Indian paintbrush Castilleja miniata
  • green carpetweed Mollugo verticillata
  • horned pondweed Zannichellia palustris
  • Illinois pondweed Potamogeton illinoensis
  • keeled bulrush Isolepis carinata
  • least duckweed Lemna minuta
  • Louisiana vetch Vicia ludoviciana
  • manyflowered monkeyflower Mimulus floribundus
  • marsh bristlegrass Setaria parviflora
  • Maximilian sunflower Helianthus maximiliani
  • meadow deathcamas Zigadenus venenosus
  • Menzies' fiddleneck Amsinckia menziesii
  • Mexican lovegrass Eragrostis mexicana
  • Mojave seablite Suaeda moquinii
  • neckweed Veronica peregrina
  • needleleaf navarretia Navarretia intertexta
  • northern water plantain Alisma triviale
  • oneflowered broomrape Orobanche uniflora
  • pale spikerush Eleocharis macrostachya
  • pitseed goosefoot Chenopodium berlandieri
  • povertyweed Iva axillaris
  • Powell's amaranth Amaranthus powellii
  • prairie plantain Plantago elongata
  • ram's horn Proboscidea louisianica
  • red baneberry Actaea rubra
  • saline saltbush Atriplex subspicata
  • salt sandspurry Spergularia salina
  • sand spikerush Eleocharis montevidensis
  • scarlet beeblossom Oenothera suffrutescens
  • scentbottle Platanthera dilatata
  • Scouler's popcornflower Plagiobothrys scouleri
  • seaside arrowgrass Triglochin maritima
  • seawrack Zostera marina
  • shortseed waterwort Elatine brachysperma
  • silverleaf nightshade Solanum elaeagnifolium
  • silverscale saltbush Atriplex argentea
  • sixweeks fescue Vulpia octoflora
  • sixweeks threeawn Aristida adscensionis
  • sleepy silene Silene antirrhina
  • slender phlox Microsteris gracilis
  • slender-spire orchid Piperia unalascensis
  • small pondweed Potamogeton pusillus
  • small Venus' looking-glass Triodanis biflora
  • southern cattail Typha domingensis
  • southwestern waterwort Elatine rubella
  • spiny naiad Najas marina
  • spotted water hemlock Cicuta maculata
  • spreading dogbane Apocynum androsaemifolium
  • starry false lily of the valley Maianthemum stellatum
  • stream orchid Epipactis gigantea
  • stretchberry Forestiera pubescens
  • sweetcicely Osmorhiza berteroi
  • swollen duckweed Lemna gibba
  • tall annual willowherb Epilobium brachycarpum
  • tarragon Artemisia dracunculus
  • Texas bergia Bergia texana
  • Texas toadflax Nuttallanthus texanus
  • threadleaf crowfoot Ranunculus trichophyllus
  • tower rockcress Arabis glabra
  • trailing pearlwort Sagina decumbens
  • tufted lovegrass Eragrostis pectinacea
  • turion duckweed Lemna turionifera
  • Virginia winged rockcress Sibara virginica
  • warty spurge Euphorbia spathulata
  • water mudwort Limosella aquatica
  • water pygmyweed Crassula aquatica
  • wavyleaf thistle Cirsium undulatum
  • western marsh cudweed Gnaphalium palustre
  • western tansymustard Descurainia pinnata
  • whitestem blazingstar Mentzelia albicaulis
  • whorled marshpennywort Hydrocotyle verticillata
  • willow dock Rumex salicifolius
  • witchgrass Panicum capillare
  • woodland strawberry Fragaria vesca
  • woolly sedge Carex pellita
  • Wright's cudweed Pseudognaphalium canescens
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.

  • beach strawberryFragaria chiloensis
  • biennial wormwoodArtemisia biennis
  • common pepperweedLepidium densiflorum
  • floating primrose-willowLudwigia peploides
  • Kentucky bluegrassPoa pratensis

Compared with California

The typical county is the median of the 58 California 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, San Luis Obispo County and California
MeasureSan Luis Obispo CountyTypical countyStatewide
Native species 329 333 1,108
Garden-ready natives 217 239 720
Tree 43 — 111
Shrub 42 — 140
Wildflower (forb) 159 — 559
Grass or grass-like 72 — 253
Vine 5 — 16
Fern 8 — 29

Neighboring counties

Counties that share a ZIP code with San Luis Obispo 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
San Luis Obispo County (county FIPS 06079), California. 329 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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