Knowing when to plant in specific hardiness ... The maps below show these planting regions. Trouble seeing the map? Click here to view the planting zones for the North Central U.S. Trouble seeing ...

Trees near the southern edge of their geographic ranges — what scientists refer to as “plant hardiness ... trajectory, so hardiness zones may actually shift further north.

The importance of hardiness zones lies in their ability to help gardeners and farmers choose plants that will thrive in their ...

This is causing plant ... zones to shift north, impacting what kinds of plants can be grown where. Plant hardiness zones are based on the coldest annual temperatures experienced by a given area ...