What Is The Plant Hardiness Zone?


USDA climate zones, or precise USDA Plant Hardiness Zones, is a climate classification of areas based on the average lowest annual temperature that the US Department of Agriculture (USDA) has published. Classification The zones range from 1 (from −60 ° F, approx. –51.1 ° C) for polar regions to 13 (up to 70 ° F, … Read more