Gardening Hardiness Zone Map
The map is divided into thirteen distinct 10ºf zones which are further divided into sub zones of 5 f.
Gardening hardiness zone map. If you see a hardiness zone in a gardening catalog or plant description chances are it refers to this usda map. National regional and state maps are available under the view maps section. Considered the standard measure of plant hardiness the usda plant hardiness zone map is based on average annual minimum winter temperatures.
The map is based on the average annual minimum winter temperature divided into 10 degree f zones. Usda plant hardiness zone map. Each growing zone is 10 f warmer or colder in an average winter than the adjacent zone.
Planting zones or growing zones are illustrated on a map known as the usda plant hardiness zone map. The 2012 usda plant hardiness zone map is the standard by which gardeners and growers can determine which plants are most likely to thrive at a location. When shopping for new plants for your garden landscape the terms plant hardiness zones growing zones and planting zones may at first seem a bit confusing.
Map downloads the plant hardiness zone map is available in a number of sizes and resolutions to meet the needs of graphic artists printers and others needing higher resolution or simpler formats.