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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.
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. 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.
This interactive map will help you find the correct planting zones or hardiness zones for gardening accurately. It's easy, you can use your ZIP Code, geolocation (with GPS), or click on a location on the map manually.
Find Your USDA Planting Zone. Considered the current standard measure of plant hardiness, the USDA 2023 Plant Hardiness Zone Map is based on average annual minimum winter temperatures. The map is divided into thirteen distinct 10ºF zones, which are further divided into sub-zones of 5°F.
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.
USDA Zone For Your Zipcode: powered by plantmaps.com ®. Find the 2012 and 2023 USDA Hardiness Zone for your ZIP Code and Display a Map.
The USDA Hardiness Zone Map divides North America into 11 separate planting zones; each growing zone is 10°F warmer (or colder) in an average winter than the adjacent zone. If you see a hardiness zone in a gardening catalog or plant description, chances are it refers to this USDA map.