Planting Zones Usa 2024. Colors on the map like red, orange, yellow, green, and blue, describe the plant's hardiness zones. Each zone is divided into half zones designated as ‘a’ and ‘b’.

The usda hardiness zone map divides north america into 11 separate planting zones; Alabama has very hot summers and mild winters, though the south tends to be warmer due to its location near the gulf of mexico, and the north, especially the appalachian mountains, tends to be cooler.