Maryland USDA Hardiness Zone Map
| 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 |
Based on the 1990 USDA Hardiness Zone Map, this interactive version covers the state of Maryland which ranges from USDA Zone 5b to USDA Zone 7b.
