USDA Hardiness Zones — Planting Guide
The USDA Plant Hardiness Zone Map divides the United States into 13 zones based on average annual minimum winter temperatures. Select your zone to see which plants thrive in your area and when to plant them.
Interactive Zone Map
Growing Season by Zone
Growing Season by Zone
Zone 1a
Jun 15 – Aug 15
Zone 1b
Jun 7 – Aug 25
Zone 2a
May 30 – Sep 1
Zone 2b
May 22 – Sep 10
Zone 3a
May 15 – Sep 15
Zone 4a
May 6 – Sep 28
Zone 5a
Apr 25 – Oct 8
Zone 5b
Apr 18 – Oct 13
Zone 6a
Apr 10 – Oct 20
Zone 6b
Apr 3 – Oct 25
Zone 7a
Mar 25 – Nov 1
Zone 7b
Mar 18 – Nov 8
Zone 8a
Mar 8 – Nov 18
Zone 8b
Feb 25 – Nov 28
Zone 9a
Feb 10 – Dec 10
Zone 10a
Jan 1 – Dec 31
0
90
180
270
365 days
| Zone | Temp Range | Description |
|---|---|---|
| Zone 1a | -60°F to -55°F | |
| Zone 1b | -55°F to -50°F | |
| Zone 2a | -50°F to -45°F | |
| Zone 2b | -45°F to -40°F | |
| Zone 3a | -40°F to -35°F | |
| Zone 3b | -35°F to -30°F | |
| Zone 4a | -30°F to -25°F | |
| Zone 4b | -25°F to -20°F | |
| Zone 5a | -20°F to -15°F | |
| Zone 5b | -15°F to -10°F | |
| Zone 6a | -10°F to -5°F | |
| Zone 6b | -5°F to 0°F | |
| Zone 7a | 0°F to 5°F | |
| Zone 7b | 5°F to 10°F | |
| Zone 8a | 10°F to 15°F | |
| Zone 8b | 15°F to 20°F | |
| Zone 9a | 20°F to 25°F | |
| Zone 9b | 25°F to 30°F | |
| Zone 10a | 30°F to 35°F | |
| Zone 10b | 35°F to 40°F | |
| Zone 11a | 40°F to 45°F | |
| Zone 11b | 45°F to 50°F | |
| Zone 12a | 50°F to 55°F | |
| Zone 12b | 55°F to 60°F | |
| Zone 13a | 60°F to 65°F | |
| Zone 13b | 65°F to 70°F |