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The USDA Plant Hardiness Zone Map is the standard by which gardeners and growers can determine which perennial plants are most likely to thrive at a location. The map is based on the average annual extreme minimum winter temperature, displayed as 10-degree F zones and 5-degree F half zones.
Hardiness zone maps are a general way to identify the low temps in your area. You should speak to your local ag extension agent to find exact low temp ranges known to occur for your area. Often a plant or tree will be able to survive an extreme low temp with some help.
The USDA Plant Hardiness Zone Map website includes an interactive-GIS map that allows the viewer to “click” down in scale to one-half mile. It also includes national, state and regional images in a variety of resolutions, and a ZIP code finder that provides the plant hardiness zone for all U.S. ZIP codes.
Find your zone by zip code →. Each of the growing zones has a coldest temperature range of five degrees, and they are labeled 1a, 1b, 2,a, 2b, etc. through to 13b. The lower the number of the zone, the colder the lowest winter temperature in that area.
This page allows you to find and download state, regional, and national Plant Hardiness Zone Maps at various resolutions. Click on the map below to download state/territory maps or scroll down to find regional and national maps for download.
You can use the USDA map to find which zone you garden in. The latest edition of the growing zone map has even more detail, making it easier to pinpoint your exact zone. You can use the map by simply looking at it and finding your location, or you can use the USDA’s zip code tool.
We include the recommended Plant Hardiness Zones for each variety. These zones are differentiated by the lowest annual temperature averaged over a 30 year period and indicate how far north a plant can be grown outdoors year-round. You can find your zone on the map below.
Knowing your hardiness zone is incredibly helpful when choosing plants for your garden, particularly for perennials or permanent landscape plants such as trees, fruit trees, and shrubs. A plant’s hardiness zone compatibility is usually listed in the plant description, such as online or on the plant’s tag.
Want to successfully grow fruits, trees, vegetables, perennials, shrubs and more in your garden? Start by finding your USDA Hardiness Zone with our Zone Map.
Use the map above to find your location and hardiness zone. For more information about hardiness zones, read our article: 3 Things to Know About Fruit Tree Hardiness Zones. For growing success: Select the right fruit trees for your hardiness zone, choose the right planting time, and optimize for your zone's weather conditions.