Plant Hardiness Zones 2024. The usda just updated their plant hardiness zone map for the first time. The new map—jointly developed by usda's agricultural research service (ars) and oregon.
On a recent visit to a plant nursery outside washington, d.c., nearly every plant tag had a usda hardiness zone, but only one, out of the several dozen checked,. 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.