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

the USDA plant hardiness map can show you exactly what's in zones 6a and 6b. Our chart can also give you a general idea, and ...

A hardiness zone is a geographic area with a similar average minimum temperature. The map is based on the average annual extreme minimum temperature, so people in those areas know which plants can ...

While earlier maps were created, the USDA hardiness zone map was first ... Eastern Idaho zones range from 3b to 6a (maybe 6b along the rivers). Much of eastern Idaho is labeled as zone 5 (a ...