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USDA Hardiness Zone Map

The United States National Arboretum gives a short history and explanation of the USDA plant hardiness zone map. Click on their link to the Zone Map to actually see the map and learn your climate zone. The site also lists representative plants by zone as well as an alphabetical list of popular woody plants and their respective zones.

King Conservation District Soil Testing

The King Conservation District has a soil testing program for anyone living within the District boundaries. This includes all of incorporated and unincorporated King County, except for cities that are not members of the King Conservation District: Enumclaw, Federal Way, Milton, Pacific and Skykomish.