Find your growing zone
Enter your ZIP code or tap the map to find your USDA plant hardiness zone, so you can choose plants that will come through your winters. Below the map you'll find the full zone chart, the zones in every state, and answers to the questions gardeners ask most.
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Find your zone
Or tap the map where you live, or choose a zone:
USDA hardiness zone chart
Each zone covers a 10°F band of the average coldest night of the year, split into a and b halves 5°F apart.
| Zone | Fahrenheit | Celsius |
|---|---|---|
| 1a | -60 to -55°F | -51 to -48°C |
| 1b | -55 to -50°F | -48 to -46°C |
| 2a | -50 to -45°F | -46 to -43°C |
| 2b | -45 to -40°F | -43 to -40°C |
| 3a | -40 to -35°F | -40 to -37°C |
| 3b | -35 to -30°F | -37 to -34°C |
| 4a | -30 to -25°F | -34 to -32°C |
| 4b | -25 to -20°F | -32 to -29°C |
| 5a | -20 to -15°F | -29 to -26°C |
| 5b | -15 to -10°F | -26 to -23°C |
| 6a | -10 to -5°F | -23 to -21°C |
| 6b | -5 to 0°F | -21 to -18°C |
| 7a | 0 to 5°F | -18 to -15°C |
| 7b | 5 to 10°F | -15 to -12°C |
| 8a | 10 to 15°F | -12 to -9°C |
| 8b | 15 to 20°F | -9 to -7°C |
| 9a | 20 to 25°F | -7 to -4°C |
| 9b | 25 to 30°F | -4 to -1°C |
| 10a | 30 to 35°F | -1 to 2°C |
| 10b | 35 to 40°F | 2 to 4°C |
| 11a | 40 to 45°F | 4 to 7°C |
| 11b | 45 to 50°F | 7 to 10°C |
| 12a | 50 to 55°F | 10 to 13°C |
| 12b | 55 to 60°F | 13 to 16°C |
| 13a | 60 to 65°F | 16 to 18°C |
| 13b | 65 to 70°F | 18 to 21°C |
Florida's growing zones
Florida runs from zone 8b in parts of the inland Panhandle to 11b in the Keys. Pensacola and Tallahassee are in zone 9a, Jacksonville 9b, Orlando and Tampa 10a, Miami and Fort Myers 10b, and Key West 11b.
Our nursery is in Miami, in zone 10b. Plants chosen for Florida gardens:
What zone is my state in?
The range of zones found across each state's ZIP codes, and the zone most of them fall in. Most states span several zones, so check your own ZIP code in the finder above.
| State | Zones | Most ZIP codes |
|---|---|---|
| Alabama | 7b to 9a | 8b |
| Alaska | 1a to 8b | 4a |
| Arizona | 5b to 10a | 9b |
| Arkansas | 7a to 8b | 8a |
| California | 5b to 11a | 9b |
| Colorado | 4a to 7a | 6a |
| Connecticut | 6a to 7b | 6b |
| Delaware | 7a to 8a | 7b |
| District of Columbia | 7b to 8a | 8a |
| Florida | 8b to 11b | 10a |
| Georgia | 7b to 9a | 8a |
| Hawaii | 10b to 13a | 12b |
| Idaho | 4a to 7b | 6b |
| Illinois | 5a to 7a | 6a |
| Indiana | 5b to 7a | 6a |
| Iowa | 4b to 6a | 5a |
| Kansas | 6a to 7a | 6b |
| Kentucky | 6b to 7b | 7a |
| Louisiana | 8b to 10a | 9a |
| Maine | 3b to 7a | 5a |
| Maryland | 6a to 8a | 7b |
| Massachusetts | 5b to 7b | 6b |
| Michigan | 4a to 7a | 6a |
| Minnesota | 3a to 5a | 4b |
| Mississippi | 7b to 9a | 8b |
| Missouri | 5b to 8a | 6b |
| Montana | 3b to 6b | 4b |
| Nebraska | 5a to 6a | 5b |
| Nevada | 5a to 9b | 9a |
| New Hampshire | 4a to 6b | 6a |
| New Jersey | 6b to 8a | 7a |
| New Mexico | 5a to 8b | 7a |
| New York | 4a to 7b | 6a |
| North Carolina | 6b to 9a | 8a |
| North Dakota | 3b to 4b | 4a |
| Ohio | 6a to 7a | 6b |
| Oklahoma | 6b to 8a | 7b |
| Oregon | 5b to 9b | 8b |
| Pennsylvania | 5b to 8a | 6b |
| Rhode Island | 6b to 7b | 6b |
| South Carolina | 8a to 9b | 8b |
| South Dakota | 4a to 5b | 4b |
| Tennessee | 6b to 8a | 7b |
| Texas | 6b to 10b | 8b |
| Utah | 4a to 8b | 6a |
| Vermont | 4a to 5b | 5a |
| Virginia | 6a to 8b | 7b |
| Washington | 6a to 9a | 8b |
| West Virginia | 5b to 7a | 6b |
| Wisconsin | 4a to 6a | 5a |
| Wyoming | 4a to 5b | 5a |
What a zone means
Each zone is based on the average coldest night of the year. Zones are 10°F apart, and each is split into an a and b half, 5°F apart. Zone 8a, for example, averages 10 to 15°F on its coldest night.
What changed on the 2023 map
The USDA updated the map in 2023, using weather from 1991 to 2020 at 13,412 stations, up from 7,983 for the 2012 map. About half of the country moved to the next warmer half zone. The other half stayed where it was.
What a zone doesn't tell you
Zones only measure winter cold. Summer heat, rainfall, humidity and soil matter too, and so does where a plant sits in your garden.
Using it with our plants
Most of our plant pages list the zones where the plant grows. Some give a patio range and an outdoor range. For trees and palms that will stay outside all year, compare the outdoor range with your zone before you order.
Questions gardeners ask
How do I find my hardiness zone?
Enter your ZIP code in the finder above, or tap the map where you live. For a street-level answer, the USDA's own map lets you search an exact address.
Is there a big difference between zone 8a and 8b?
Each half zone is 5°F apart in the average coldest night of the year: 8a averages 10 to 15°F, and 8b 15 to 20°F. For a plant at the edge of its range, that difference can decide whether it comes through the winter.
Where is zone 8b in the US?
Zone 8b runs across the South, from Texas through Louisiana, Mississippi, Alabama and Georgia to South Carolina, and up the Pacific coast in Oregon and Washington. Texas has more ZIP codes in zone 8b than any other state.
What planting zone is Texas in?
Texas runs from zone 6b to 10b. More of its ZIP codes are in zone 8b than any other zone.
What growing zone is North Carolina in?
North Carolina runs from zone 6b to 9a. Most of its ZIP codes are in zone 8a.
What growing zone is Florida in?
Florida runs from zone 8b in parts of the inland Panhandle to 11b in the Keys. Orlando is in zone 10a and Miami in 10b.
Zones from the 2023 USDA Plant Hardiness Zone Map data (PRISM Climate Group, Oregon State University), mapped by ZIP code, and state boundaries and ZIP code centres from the US Census Bureau. This is not the official USDA map, and a ZIP code gives an approximate answer. For a street-level answer, use the USDA map at planthardiness.ars.usda.gov.