U.S. Zone Map.
Saturday, February 18, 2012 at 8:17AM
Gary Leavitt

The 2012 USDA Plant Hardiness Zone Map is the standard by which gardeners and growers can determine which plants are most likely to thrive at a location. The map is based on the average annual minimum winter temperature, divided into 10-degree F zones.

Click on their National map to enlarge:USDA PLANT HARDINESS ZONE MAP OF THE UNITED STATES. CLICK TO ENLARGE.

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