District of Columbia planting calendar
Most of District of Columbia falls in USDA hardiness zones 7a–7b. Your exact zone depends on your local area — look it up by ZIP code — then open your zone's month-by-month calendar below.
USDA hardiness zones in District of Columbia
| Zone | Coldest temps | Avg. last spring frost |
|---|---|---|
| Zone 7a | 0 to 5°F | Apr 7 |
| Zone 7b | 5 to 10°F | Apr 1 |