USDA Hardiness Map

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USDA Hardiness Map

USDA Hardiness Map

Average Low Temperatures
Zone 4 -30°F to -20°F

Zone 5 -20°F to -10°F
Zone 6 -10°F to 0°F
Zone 7 -0°F to 10°F
Zone 8 -10°F to 20°F

Map courtesy Boise Matthews, GoAmericanWest.com