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

Knowing when to plant in specific hardiness zones is important to maximize the spring season's potential. A hardiness zone is a geographic area with a similar average minimum temperature. The map ...

IDAHO FALLS — Gardeners often talk about plant hardiness ... While earlier maps were created, the USDA hardiness zone map was first published in 1960. The hardiness zone is based on the average ...