Usda Hardiness Zones 2024 Map. If you see a hardiness zone in a gardening catalog or plant description, chances are it. The usda hardiness zone map divides north america into 11 separate planting zones;
The new map—jointly developed by usda’s agricultural research service (ars) and oregon state university’s (osu) prism climate group—is more accurate and contains greater detail than prior versions. You can find your usda hardiness zone on the updated interactive map, here.