USDA Hardiness Zones Map
Find your grow zone by state. Click any state to see frost dates, growing season, and plant recommendations.
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How the map works
Each zone covers a 10°F temperature range, split into "a" (colder half) and "b" (warmer half). A plant labeled "hardy to zone 5" can survive typical winters in zones 5 and warmer.
The 2023 USDA map reflects climate warming — many areas shifted half a zone warmer vs. the 2012 version. Our map shows the real 2023 zone boundaries — zoom in to see how zones vary by elevation, proximity to water, and urban heat.
→ Use ZIP lookup for your precise zoneAll Zone Guides
Zone 3a
-40°F to -35°F
The Frontier Homestead
Frost-free ~90-120 days · Last frost Late May
Zone 3b
-35°F to -30°F
The Pioneer's Promise
Frost-free ~100-130 days · Last frost Mid-to-late May
Zone 4a
-30°F to -25°F
The Colonial Outskirts
Frost-free ~110-140 days · Last frost Mid-May
Zone 4b
-25°F to -20°F
The Settler's Sanctuary
Frost-free ~120-150 days · Last frost Early-to-mid May
Zone 5a
-20°F to -15°F
The New England Heritage
Frost-free ~130-160 days · Last frost Early May
Zone 5b
-15°F to -10°F
The Commonwealth Garden
Frost-free ~140-170 days · Last frost Late April to early May
Zone 6a
-10°F to -5°F
The Appalachian Hearth
Frost-free ~150-180 days · Last frost Late April
Zone 6b
-5°F to 0°F
The Blue Ridge Bounty
Frost-free ~160-190 days · Last frost Mid-April
Zone 7a
0°F to 5°F
The Temperate Highlands
Frost-free ~180-220 days · Last frost Early-to-mid April
Zone 7b
5°F to 10°F
The Piedmont Heartland
Frost-free ~200-240 days · Last frost Early April
Zone 8a
10°F to 15°F
The Magnolia Midland
Frost-free ~220-260 days · Last frost Late March
Zone 8b
15°F to 20°F
The Southern Sunbelt
Frost-free ~240-280 days · Last frost Mid-March
Zone 9a
20°F to 25°F
The Colonial Bounty
Frost-free ~270-310 days · Last frost Late February
Zone 9b
25°F to 30°F
The Gulf Coast Garden
Frost-free ~300-340 days · Last frost Mid-February
Zone 10a
30°F to 35°F
The Subtropical Stronghold
Frost-free ~330-360 days · Last frost Late January (rare)
Zone 10b
35°F to 40°F
The Everglades Eden
Frost-free ~360 days · Last frost Essentially none
Zone 11a
40°F to 45°F
The Tropical Territory
Frost-free year-round · Last frost None
Zone 11b
45°F to 50°F
The Hawaiian Haven
Frost-free year-round · Last frost None
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