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 ...

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

which is slightly lower than the world’s current warming trajectory, so hardiness zones may actually shift further north. Places where hardiness zones will remain unchanged could still undergo ...

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 ...

Plant hardiness zones are based on the coldest annual temperatures experienced by a given area. The map below shows us plant zones throughout southern and central California. While the complex ...