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What are Hardiness Zones, Gardening Zones, Growing Zones and Plant Zones?
Hardiness Zones, Gardening Zones, Growing Zones and Plant Zones refer to defined geographic regions that can support specific plants, flowers and trees. The zones define a minimum range of temperatures that a plant or tree can survive safely in that zone. The most commonly used Hardiness Zones were defined by the USDA. The USDA provides a hard copy map that displays these zone throughout the US. The last update to this map covers minimum temperatures from 1961 to 1990. An updated map is currently in production, but has not been released yet. Plant Maps provides the only interactive version of the USDA hardiness zone map available on the internet.
Zone Maps for Adjacent States
California Zone MapIdaho Zone Map
Nevada Zone Map
Washington Zone Map
Other Interactive Gardening Maps and Data for Oregon
Interactive Oregon Drought Monitor MapOregon First Frost Date Map
Oregon Last Frost Date Map
Interactive Map of Oregon Drought Conditions
Interactive Map of Oregon Heat Zones
Interactive Map of Oregon Ecoregions
Interactive Maps of Native Oregon Trees and Plants
Interactive Oregon Plantmaps Hardiness Zone Map
Zoom to Major Cities in Oregon
Bend - USDA Zone 6aEugene - USDA Zone 8aMedford - USDA Zone 8aPortland - USDA Zone 8bSalem - USDA Zone 8aInteractive Maps of Oregon Native Plants Distribution Areas
Abies grandis - grand fir MapAcer circinatum - vine maple MapAcer glabrum - Rocky Mountain maple MapAcer macrophyllum - bigleaf maple MapAlnus rhombifolia - white alder MapAlnus rubra - red alder MapAlnus sinuata - Sitka alder MapAmelanchier alnifolia - western serviceberry MapArbutus menziesii - Pacific madrone MapCastanopsis chrysophylla - golden chinkapin MapCeanothus thyrsiflorus - blueblossom MapCercocarpus betuloides - birchleaf cercocarpus MapChamaecyparis lawsoniana - Port Orford cedar MapCornus nuttallii - Pacific dogwood MapCornus occidentalis - western dogwood MapCornus stolonifera - red osier dogwood MapCorylus cornuta - beaked hazel MapCrataegus douglasii - black hawthorn MapEuonymus occidentalis - western wahoo MapFraxinus latifolia - Oregon ash MapGarrya elliptica - wavyleaf silktassel MapLithocarpus densiflorus - tanoak MapMalus diversifolia - Oregon crab apple MapMyrica californica - Pacific bayberry MapPicea sitchensis - Sitka spruce MapPinus attenuata - knobcone pine MapPinus contorta - lodgepole pine MapPinus jeffreyi - Jeffrey pine MapPinus lambertiana - sugar pine MapPinus monticola - western white pine MapPinus ponderosa - ponderosa pine MapPopulus tremuloides - quaking aspen MapPopulus trichocarpa - black cottonwood MapPrunus emarginata - bitter cherry MapPseudotsuga menziesii - Douglas fir MapQuercus garryana - Oregon white oak MapRhamnus californica - California buckthorn MapRhamnus purshiana - cascara buckthorn MapRhododendron macrophyllum - Pacific rhododendron MapSalix hookeriana - Hooker willow MapSalix lasiandra - Pacific willow MapSalix lasiolepis - arroyo willow MapSalix scouleriana - Scouler willow MapSalix sitchensis - Sitka willow MapSambucus callicarpa - Pacific red elder MapSambucus glauca - blueberry elder MapSequoia sempervirens - redwood MapTaxus brevifolia - Pacific yew MapThuja plicata - western redcedar MapTsuga heterophylla - western hemlock MapUmbellularia californica - California laurel MapView More Interactive Maps of Oregon Plants and Trees...