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USDA Hardiness Zone Map by ZIP Code
Find your planting zone from your ZIP code. Zones are based on the average coldest winter night, from the 2023 USDA Plant Hardiness Zone Map, and cover all 50 states, Washington DC and Puerto Rico.
Planting zones by state
Each state is coloured by its most common zone. Tap a state for its cities and ZIP codes.
A simplified map that shows one zone per state. It is not the official USDA Plant Hardiness Zone Map; most states span several zones, so use your ZIP code or your state’s page for your zone.
Hardiness zones and temperatures
The average coldest night of the year in each zone (1991–2020).
| Zone | °F | °C |
|---|---|---|
| Zone 1a | -60 to -55 °F | -51 to -48 °C |
| Zone 1b | -55 to -50 °F | -48 to -46 °C |
| Zone 2a | -50 to -45 °F | -46 to -43 °C |
| Zone 2b | -45 to -40 °F | -43 to -40 °C |
| Zone 3a | -40 to -35 °F | -40 to -37 °C |
| Zone 3b | -35 to -30 °F | -37 to -34 °C |
| Zone 4a | -30 to -25 °F | -34 to -32 °C |
| Zone 4b | -25 to -20 °F | -32 to -29 °C |
| Zone 5a | -20 to -15 °F | -29 to -26 °C |
| Zone 5b | -15 to -10 °F | -26 to -23 °C |
| Zone 6a | -10 to -5 °F | -23 to -21 °C |
| Zone 6b | -5 to 0 °F | -21 to -18 °C |
| Zone 7a | 0 to 5 °F | -18 to -15 °C |
| Zone 7b | 5 to 10 °F | -15 to -12 °C |
| Zone 8a | 10 to 15 °F | -12 to -9 °C |
| Zone 8b | 15 to 20 °F | -9 to -7 °C |
| Zone 9a | 20 to 25 °F | -7 to -4 °C |
| Zone 9b | 25 to 30 °F | -4 to -1 °C |
| Zone 10a | 30 to 35 °F | -1 to 2 °C |
| Zone 10b | 35 to 40 °F | 2 to 4 °C |
| Zone 11a | 40 to 45 °F | 4 to 7 °C |
| Zone 11b | 45 to 50 °F | 7 to 10 °C |
| Zone 12a | 50 to 55 °F | 10 to 13 °C |
| Zone 12b | 55 to 60 °F | 13 to 16 °C |
| Zone 13a | 60 to 65 °F | 16 to 18 °C |
| Zone 13b | 65 to 70 °F | 18 to 21 °C |
Zones by state
- Alabama 7b–9b
- Alaska 1a–8b
- Arizona 5b–10a
- Arkansas 7a–8b
- California 5b–11a
- Colorado 4a–7a
- Connecticut 6a–7b
- Delaware 7a–8a
- District of Columbia 7b–8a
- Florida 8b–11b
- Georgia 7a–9a
- Hawaii 10b–13a
- Idaho 4a–7b
- Illinois 5a–7a
- Indiana 5b–7a
- Iowa 4b–6a
- Kansas 6a–7a
- Kentucky 6b–7b
- Louisiana 8b–10a
- Maine 3b–7a
- Maryland 6a–8a
- Massachusetts 5b–7b
- Michigan 4a–7a
- Minnesota 3a–5a
- Mississippi 7b–9a
- Missouri 5b–8a
- Montana 3b–6b
- Nebraska 5a–6a
- Nevada 5a–10a
- New Hampshire 4a–6b
- New Jersey 6b–8a
- New Mexico 5a–8b
- New York 4a–7b
- North Carolina 6b–9a
- North Dakota 3b–4b
- Ohio 6a–7a
- Oklahoma 6b–8a
- Oregon 5b–9b
- Pennsylvania 5b–8a
- Puerto Rico 11b–13b
- Rhode Island 6b–7b
- South Carolina 8a–9b
- South Dakota 4a–5b
- Tennessee 6b–8a
- Texas 6b–10b
- Utah 4a–8b
- Vermont 4a–6a
- Virginia 6a–8b
- Washington 6a–9b
- West Virginia 5b–7a
- Wisconsin 3b–6a
- Wyoming 4a–5b
Zones: 2023 USDA Plant Hardiness Zone Map ZIP code data, USDA Agricultural Research Service and the PRISM Climate Group, Oregon State University (official map). Place names: GeoNames (CC BY 4.0). Each ZIP code gets one zone, but a ZIP code can cross a zone line, and hills, valleys and towns can be warmer or colder than the zone shown.
About the Hardiness Zone Map
The Hardiness Zone Map finds your USDA plant hardiness zone, also called your planting or growing zone, from your ZIP code. Zones are based on the average coldest winter night of the year: each zone is 10 °F wide and split into a and b halves of 5 °F, from zone 1a in Alaska to 13b in Puerto Rico. Plant labels and seed packets give the coldest zone a plant can survive, so knowing your zone tells you which perennials, shrubs and trees can stay outside all winter. Zones come from the official 2023 USDA map ZIP code data for all 50 states, Washington DC and Puerto Rico.
How to use it
- 1 Enter your 5-digit ZIP code and press Find my zone.
- 2 Read your zone and the average coldest winter temperature it stands for.
- 3 Open your state to see its zones and the zone of every city.
- 4 Choose plants rated for your zone number or a colder (lower) one.
Frequently asked questions
What is a plant hardiness zone?
A hardiness zone groups places by their average extreme winter low: the coldest night of the year, averaged over 1991–2020. Zone 7b, for example, means that night is usually between 5 and 10 °F. A plant hardy to zone 7 should survive winters there.
Is a planting zone the same as a growing zone?
Yes. Planting zone, growing zone, gardening zone and hardiness zone all mean the USDA plant hardiness zone. It is about winter cold only, not summer heat, rainfall or soil.
When was the USDA zone map last updated?
The current map was released in November 2023 and uses weather data from 1991 to 2020. About half the country moved into a warmer half zone compared with the 2012 map.
Why is my ZIP code not found?
Some ZIP codes are only for PO boxes, single buildings or the military and have no area on the map. Try a nearby ZIP code or pick your state and city from the list.
Do zones tell me when to plant?
Not directly. Zones say which plants survive the winter. When to sow and plant depends on your last spring and first autumn frost dates, which vary within a zone, so check your local extension service as well.
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