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20120106-OC-AMW-0098 | by USDAgov
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This is the plant hardiness zone map for 2012. The first plant hardiness zone map was compiled by the Arnold Arboretum, Harvard University, Boston, Massachusetts in 1927 by Dr. Alfred Rehder. A new map was created and redesigned using 40 years of data from the 1936 Atlas of American Agriculture and published in the book Hedges, Screens and Windbreaks by Donald Wyman. This 1938 plant hardiness zone map became the prototype for future maps. The U. S. Department of Agriculture (USDA) produced its first plant hardiness zone map using this 1938 format for its design and continued with this format to date. USDA’s Agricultural Research Service (ARS) in conjunction with USDA partners compiles and produces these maps for use by American gardeners. Image courtesy of USDA ARS. For further information and local maps please go to the following website:




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Taken on March 21, 2012