Interactive USDA Gardening and Plant Hardiness Zone Map for Washington

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

USDA Zone 6a

-10°F to -5°F

USDA Zone 6b

-5°F to 0°F

USDA Zone 7a

0°F to 5°F

USDA Zone 7b

5°F to 10°F

USDA Zone 8a

10°F to 15°F

USDA Zone 8b

15°F to 20°F

USDA Zone 9a

20°F to 25°F

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. In 2012 the USDA released an updated Washington hardiness zone map covering the period of 1981-2010

Zone Maps for Adjacent States and Provinces

Idaho Zone Map
Oregon Zone Map
British Columbia Zone Map

Other Interactive Gardening Maps and Data for Washington

Washington 2012 USDA Hardiness Zone Map
Map of Washington Record High/Low Temperatures
Washington Last Frost Date Map
Washington First Frost Date Map
Interactive Washington Drought Monitor Map
Interactive Map of Washington Drought Conditions
Interactive Map of Washington Heat Zones
Interactive Map of Washington Ecoregions
Interactive Maps of Native Washington Trees and Plants

Zoom to Major Cities in Washington

Zoom to Bellevue USDA Zone 8aBellevue - USDA Zone 8a
Zoom to Seattle USDA Zone 8aSeattle - USDA Zone 8a
Zoom to Spokane USDA Zone 5bSpokane - USDA Zone 5b
Zoom to Tacoma USDA Zone 8aTacoma - USDA Zone 8a
Zoom to Vancouver USDA Zone 8bVancouver - USDA Zone 8b
Zoom to Yakima USDA Zone 6bYakima - USDA Zone 6b

Interactive Maps of Washington Native Plants Distribution Areas

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