Sometimes called “growing zones” or “gardening zones,” USDA plant hardiness zones refer to areas of a map developed by the ...

Even in each state, growing zones are varied ... If you look at the USDA map, California ranges from 5a–9b. The latter zone, 9b, is very warm throughout most of the year. But 5a will experience ...

The U.S. Department of Agriculture (USDA) has a Plant Hardiness Zone Map that divides the U.S. into 13 different zones, which helps gardeners choose plants that can survive in their respective ...