23+ U.s. Department Of Agriculture Hardiness Zones Images. Therefore, to ensure your new. Department of agriculture's (usda) plant hardiness zone map reflects average low in january 2012, the usda and oregon state university released a new plant hardiness zone map, which provides gardeners and scientists with average low temperatures over a thirty year time frame.
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Albers equal area projection, standard parallels of 29.5°n and 45.5°n, scale 1 :
Hardiness zones, developed by the u.s.d.a., provide a means of comparing prevailing atmospheric conditions and the durability of various species of plants. When ordering, you can determine if the item will be winter hardy in your area by checking the zone information on the item's description. Most gardeners are familiar with the u.s. Usda plant hardiness zones are the standard when it comes to determining which plants will grow best in a particular us region, so you need to get clear on this the agricultural research service of the united states department of agriculture is the official resource on usda plant hardiness zones.