Washington Planting Zones

Washington Planting Zones. The state of Washington falls into U.S. Department of Agriculture hardiness zones 6 through 9. The USDA hardiness zones rate average temperatures across the country, so gardeners may gauge whether a particular plant is likely to be perennial in their area. Washington’s winter average temperatures fall between zero to 20…

Table of contents Washington Planting Zones
Average Minimum Temperature 00:50
Frost Dates 01:40
Native Flowers 02:35
Native Plants 03:18

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