Usda Plant Hardiness Map 2025 Usda. The new map—jointly developed by usda's agricultural research. Average date of last spring freeze across the united states used in conjunction with the usda’s plant hardiness zone map, and proper crop.

Usda’s plant hardiness zone map is the standard by which gardeners and growers can determine which plants are most likely to thrive at a location. There’s a good chance your zone shifted when the usda updated its plant hardiness map in 2023.