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🇺🇸 Growing Guides for the United States

Browse by USDA hardiness zone or state — find exact planting dates and crop lists for your area.

Browse by USDA Hardiness Zone

USDA zones are based on average annual minimum winter temperatures — the standard for US gardeners.

Zone 1a Last frost early July 14 growing days Zone 1b Last frost mid-June 47 growing days Zone 2a Last frost late May 98 growing days Zone 2b Last frost mid-May 122 growing days Zone 3a Last frost mid-May 123 growing days Zone 3b Last frost early May 153 growing days Zone 4a Last frost late April 163 growing days Zone 4b Last frost mid-April 183 growing days Zone 5a Last frost mid-April 183 growing days Zone 5b Last frost early April 197 growing days Zone 6a Last frost early April 213 growing days Zone 6b Last frost mid-March 244 growing days Zone 7a Last frost early March 258 growing days Zone 7b Last frost late February 276 growing days Zone 8a Last frost mid-February 288 growing days Zone 8b Last frost late January 319 growing days Zone 9a Last frost late January 333 growing days Zone 9b Last frost mid-January 348 growing days Zone 10a rare frost 330 growing days Zone 10b Frost-free 345 growing days Zone 11a Frost-free 365 growing days Zone 11b Frost-free 365 growing days Zone 12a Frost-free 365 growing days Zone 12b Frost-free 365 growing days Zone 13a Frost-free 365 growing days Zone 13b Frost-free 365 growing days

Browse by State

Alabama Zone 8a 270 days Alaska Zone 1b 80 days Arizona Zone 9a 300 days Arkansas Zone 7a 240 days California Zone 9b 300 days Colorado Zone 5b 155 days Connecticut Zone 6a 198 days Delaware Zone 7a 220 days Florida Zone 9b 340 days Georgia Zone 8a 270 days Hawaii Zone 12a 365 days Idaho Zone 6a 183 days Illinois Zone 5b 183 days Indiana Zone 5b 183 days Iowa Zone 5a 175 days Kansas Zone 6a 195 days Kentucky Zone 6b 210 days Louisiana Zone 8b 310 days Maine Zone 5a 155 days Maryland Zone 7a 220 days Massachusetts Zone 6a 183 days Michigan Zone 5b 175 days Minnesota Zone 4a 155 days Mississippi Zone 8a 265 days Missouri Zone 6a 198 days Montana Zone 5a 155 days Nebraska Zone 5b 183 days Nevada Zone 7a 183 days New Hampshire Zone 5b 155 days New Jersey Zone 6b 213 days New Mexico Zone 7a 195 days New York Zone 6a 183 days North Carolina Zone 7b 244 days North Dakota Zone 4a 155 days Ohio Zone 5b 183 days Oklahoma Zone 7a 213 days Oregon Zone 8b 244 days Pennsylvania Zone 6a 198 days Rhode Island Zone 6b 198 days South Carolina Zone 8a 260 days South Dakota Zone 4b 155 days Tennessee Zone 6b 240 days Texas Zone 8a 270 days Utah Zone 6a 165 days Vermont Zone 5a 155 days Virginia Zone 7a 213 days Washington Zone 8b 244 days West Virginia Zone 6a 183 days Wisconsin Zone 5a 155 days Wyoming Zone 4b 145 days

🗺️ USDA Plant Hardiness Zones

2023 USDA Plant Hardiness Zone Map — zones 1 to 13

2023 USDA Plant Hardiness Zone Map — public domain. USDA Agricultural Research Service

1 2 3 4 5 6 7 8 9 10 11 12 13

USDA zones run 1a–13b (26 half-zones). Each full zone above covers both the a and b half-zones. Browse all US zones →

Frequently Asked Questions

Enter your ZIP code on the WhatCanGrow homepage to instantly find your USDA hardiness zone.
There are 26 USDA hardiness zones — 13 full zones (1–13) each split into a and b half-zones. Most of the continental US falls between Zone 3 and Zone 10.
Zones 5–8 cover the majority of the continental US population. Zone 6 and 7 are particularly common across the mid-Atlantic, South, and Pacific Northwest.
Yes — the USDA updated the map in 2023. About half of the US shifted to a warmer half-zone compared to the 2012 edition, reflecting changing climate patterns.