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USDA releases new version of plant hardiness zone map

Issue Date: February 1, 2012

The U.S. Department of Agriculture has released the new version of its plant hardiness zone map, updating a useful tool for gardeners and researchers for the first time since 1990 with greater accuracy and detail. The new map—jointly developed by USDA's Agricultural Research Service and Oregon State University's PRISM Climate Group—is available online at www.planthardiness.ars.usda.gov.

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