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Planting zones by state

USDA plant hardiness zones for every state from the 2023 map, with the range of zones found in each and the zones for major cities.

Alabama 7b to 9b Alaska 1a to 8b Arizona 5b to 10a Arkansas 7a to 8b California 5b to 11a Colorado 4a to 7a Connecticut 6a to 7b Delaware 7a to 8a District of Columbia 7b to 8a Florida 8b to 11b Georgia 7a to 9a Hawaii 10b to 13a Idaho 4a to 7b Illinois 5a to 7a Indiana 5b to 7a Iowa 4b to 6a Kansas 6a to 7a Kentucky 6b to 7b Louisiana 8b to 10a Maine 3b to 7a Maryland 6a to 8a Massachusetts 5b to 7b Michigan 4a to 7a Minnesota 3a to 5a Mississippi 7b to 9a Missouri 5b to 8a Montana 3b to 6b Nebraska 5a to 6a Nevada 5a to 10a New Hampshire 4a to 6b New Jersey 6b to 8a New Mexico 5a to 8b New York 4a to 7b North Carolina 6b to 9a North Dakota 3b to 4b Ohio 6a to 7a Oklahoma 6b to 8a Oregon 5b to 9b Pennsylvania 5b to 8a Rhode Island 6b to 7b South Carolina 8a to 9b South Dakota 4a to 5b Tennessee 6b to 8a Texas 6b to 10b Utah 4a to 8b Vermont 4a to 6a Virginia 6a to 8b Washington 6a to 9b West Virginia 5b to 7a Wisconsin 3b to 6a Wyoming 4a to 5b

Why a state has more than one zone

Zones follow winter cold, which changes with latitude, elevation and distance from oceans and large lakes. That is why a big state like Texas or California can cover several zones, and why mountain towns are often a zone or more colder than the valleys nearby. For the most precise answer, look up your own ZIP code.

The warmest and coldest places

On the 2023 map data, the coldest zones (1a to 2a) are all in Alaska. The warmest are in Puerto Rico and Hawaii, which reach zones 12 and 13, while Florida, California and Hawaii have zone 11 ZIP codes. Use the state pages for the full range, the zones of major cities and example places in each zone.

Every zone on this site comes from the 2023 USDA Plant Hardiness Zone Map data published by the PRISM Climate Group at Oregon State University.

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