Based on the 1990 USDA Hardiness Zone Map, this interactive version covers the state of Washington which ranges from USDA Zone 4b to USDA Zone 9a.
USDA Zone 4b-25°F to -20°F | USDA Zone 5a-20°F to -15°F | USDA Zone 5b-15°F to -10°F |
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.
Bellevue - USDA Zone 8a
Seattle - USDA Zone 8a
Spokane - USDA Zone 5b
Tacoma - USDA Zone 8a
Vancouver - USDA Zone 8b
Yakima - USDA Zone 6b
Abies grandis - grand fir Map
Acer circinatum - vine maple Map
Acer glabrum - Rocky Mountain maple Map
Acer macrophyllum - bigleaf maple Map
Alnus rubra - red alder Map
Alnus sinuata - Sitka alder Map
Amelanchier alnifolia - western serviceberry Map
Arbutus menziesii - Pacific madrone Map
Cornus nuttallii - Pacific dogwood Map
Cornus occidentalis - western dogwood Map
Cornus stolonifera - red osier dogwood Map
Corylus cornuta - beaked hazel Map
Crataegus douglasii - black hawthorn Map
Malus diversifolia - Oregon crab apple Map
Picea sitchensis - Sitka spruce Map
Pinus contorta - lodgepole pine Map
Pinus monticola - western white pine Map
Populus trichocarpa - black cottonwood Map
Prunus emarginata - bitter cherry Map
Prunus virginiana - common chokecherry Map
Pseudotsuga menziesii - Douglas fir Map
Quercus garryana - Oregon white oak Map
Rhamnus purshiana - cascara buckthorn Map
Rhododendron macrophyllum - Pacific rhododendron Map
Salix hookeriana - Hooker willow Map
Salix lasiandra - Pacific willow Map
Salix scouleriana - Scouler willow Map
Salix sitchensis - Sitka willow Map
Sambucus callicarpa - Pacific red elder Map
Sambucus glauca - blueberry elder Map
Taxus brevifolia - Pacific yew Map
Thuja plicata - western redcedar Map
Tsuga heterophylla - western hemlock Map