Hardiness zones are geographical area in which a given category of plants are able to grow and survive.
View U.s. Department Of Agriculture Hardiness Zones 8 Or 9 PNG. Each growing zone is 10°f warmer (or colder) in an average winter than if you see a hardiness zone in a gardening catalog or plant description, chances are it refers to this usda map. The maps below are available for download but can be large so you may hardiness zone map produced by the usda (united states department of agriculture) that started it all.
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Each of the map's colored zones is separated by 10 degrees and divided into subzones a and b, separated by five degrees. Department of agriculture plant hardiness zone map supersedes the 1965 version. First published in 1960, the map divides north america into 11 hardiness zones.
All of australia (excluding macquarie.
United states department of agriculture. Department of agriculture, national agricultural library. Hardiness zone map based upon data from 5,000 national climatic data center cooperative stations across the continental united states. The zone is defined by climatic conditions including temperature.
