2105951
9781563731822
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The United States Department of Agriculture (USDA) divides the United States into 10 climate zones that are based on the average first and last frost dates in each zone. The dates determine the length of the growing season, or frost-free days, in each zone. The zones are numbered north to south, I through 10; the lower the number, the colder the winter and the shorter the growing season.Carter, Louise is the author of 'Xeriscape Guide 2005 Calendar', published 2004 under ISBN 9781563731822 and ISBN 1563731827.
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