It hasn’t been done in over a decade, but the USDA has now updated what it calls the “plant hardiness” map for the first time since 2013. (That’s “hardiness” as in “hearty,” for if ...

Hardiness Zones 101 The USDA Plant Hardiness Zone Map consists of 13 individual zones that take in all of the contiguous United States, plus Alaska, Hawaii, and Puerto Rico. The first zone lies at ...

creating the first official USDA Plant Hardiness Zone Map. USDA Hardiness Zone Map (Contributed) Since its initial release, the USDA Plant Hardiness Zone Map has been updated several times to ...