USDA Hardiness Zones
Understanding hardiness zones helps you choose plants that will thrive in your climate.
| Zone | Temp Range (°F) | Temp Range (°C) | Description |
|---|---|---|---|
| Zone 1 | -60 to -50°F | -51 to -46°C | Extreme arctic cold. Only the hardiest plants survive. |
| Zone 2 | -50 to -40°F | -46 to -40°C | Very cold subarctic regions. Limited to extremely cold-hardy species. |
| Zone 3 | -40 to -30°F | -40 to -34°C | Northern plains and mountains. Short growing season with harsh winters. |
| Zone 4 | -30 to -20°F | -34 to -29°C | Northern US and southern Canada. Many perennials and cold-hardy trees thrive. |
| Zone 5 | -20 to -10°F | -29 to -23°C | Central US corridor. Wide variety of plants including most roses and fruit trees. |
| Zone 6 | -10 to 0°F | -23 to -18°C | Mid-Atlantic and Pacific Northwest. Broad plant selection available. |
| Zone 7 | 0 to 10°F | -18 to -12°C | Upper South and coastal areas. Camellias, gardenias, and many broadleaf evergreens. |
| Zone 8 | 10 to 20°F | -12 to -7°C | Deep South and Pacific coast. Citrus, palms, and subtropical plants. |
| Zone 9 | 20 to 30°F | -7 to -1°C | Gulf Coast and Southern California. Tropical and subtropical plants thrive. |
| Zone 10 | 30 to 40°F | -1 to 4°C | Southern Florida and Hawaii. Frost-free most years; true tropical plants. |
| Zone 11 | 40 to 50°F | 4 to 10°C | Hawaii and tropical territories. Year-round tropical growing conditions. |
| Zone 12 | 50 to 60°F | 10 to 16°C | Tropical only. No frost ever; limited to US tropical territories. |
| Zone 13 | 60 to 70°F | 16 to 21°C | Equatorial tropics. Constant warm temperatures year-round. |