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USDA Plant Hardiness Zone Map
How to use this Hyperlinked Map**Click on any area within the United States to go to a close-up of that region **
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Listed by zone. -- Names of representative plants listed under the coldest zones in which they normally succeed.
Listed alphabetically. -- Cold hardiness ratings (zones) for selected woody plants.
Authored by Henry M. Cathey while Director, U.S. National Arboretum
Edited, formatted and prepared for the US National Arboretum web site by Ramon Jordan, March 1998
U.S. National Arboretum, Agricultural Research Service, U.S. Department of Agriculture,
Washington, DC 20002.
Updated and edited, by Yankee Gardener, February 2001
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