Delaware Planting Zones
Delaware runs from zone 7a to zone 8a on the 2023 USDA map. Zone 7b is the most common, covering 94% of the state's ZIP codes. Wilmington is 7b and Dover is 7b.
Zones across Delaware
| Zone | Average coldest night | Share of Delaware ZIP codes |
|---|---|---|
| 7a | 0 to 5°F | 2% |
| 7b | 5 to 10°F | 94% |
| 8a | 10 to 15°F | 4% |
Planting zone for every city and town in Delaware
Each Delaware town uses the ZIP code at its center. Big towns can cross into the next half-zone, so look up your own ZIP if you're near a line.
| City | Zone | Average coldest night |
|---|---|---|
| Arden | 7b | 5 to 10°F |
| Ardencroft | 7b | 5 to 10°F |
| Ardentown | 7b | 5 to 10°F |
| Bellefonte | 7b | 5 to 10°F |
| Bethany Beach | 8a | 10 to 15°F |
| Bethel | 7b | 5 to 10°F |
| Blades | 7b | 5 to 10°F |
| Bowers | 7b | 5 to 10°F |
| Bridgeville | 7b | 5 to 10°F |
| Camden | 7b | 5 to 10°F |
| Cheswold | 7b | 5 to 10°F |
| Clayton | 7b | 5 to 10°F |
| Dagsboro | 7b | 5 to 10°F |
| Delaware City | 7b | 5 to 10°F |
| Delmar | 7b | 5 to 10°F |
| Dewey Beach | 8a | 10 to 15°F |
| Dover | 7b | 5 to 10°F |
| Ellendale | 7b | 5 to 10°F |
| Elsmere | 7b | 5 to 10°F |
| Farmington | 7b | 5 to 10°F |
| Felton | 7b | 5 to 10°F |
| Fenwick Island | 8a | 10 to 15°F |
| Frankford | 7b | 5 to 10°F |
| Frederica | 7b | 5 to 10°F |
| Georgetown | 7b | 5 to 10°F |
| Greenwood | 7b | 5 to 10°F |
| Harrington | 7b | 5 to 10°F |
| Hartly | 7b | 5 to 10°F |
| Henlopen Acres | 8a | 10 to 15°F |
| Houston | 7b | 5 to 10°F |
| Kenton | 7b | 5 to 10°F |
| Laurel | 7b | 5 to 10°F |
| Leipsic | 7b | 5 to 10°F |
| Lewes | 7b | 5 to 10°F |
| Little Creek | 7b | 5 to 10°F |
| Magnolia | 7b | 5 to 10°F |
| Middletown | 7b | 5 to 10°F |
| Milford | 7b | 5 to 10°F |
| Millsboro | 7b | 5 to 10°F |
| Millville | 7b | 5 to 10°F |
| Milton | 7b | 5 to 10°F |
| New Castle | 7b | 5 to 10°F |
| Newark | 7b | 5 to 10°F |
| Newport | 7b | 5 to 10°F |
| Ocean View | 7b | 5 to 10°F |
| Odessa | 7b | 5 to 10°F |
| Rehoboth Beach | 8a | 10 to 15°F |
| Seaford | 7b | 5 to 10°F |
| Selbyville | 7b | 5 to 10°F |
| Slaughter Beach | 7b | 5 to 10°F |
| Smyrna | 7b | 5 to 10°F |
| South Bethany | 8a | 10 to 15°F |
| Townsend | 7b | 5 to 10°F |
| Viola | 7b | 5 to 10°F |
| Wilmington | 7b | 5 to 10°F |
| Woodside | 7b | 5 to 10°F |
| Wyoming | 7b | 5 to 10°F |
Source: USDA Plant Hardiness Zone Map, 2023, Agricultural Research Service, U.S. Department of Agriculture; ZIP code table from the PRISM Group, Oregon State University (accessed Oct 2026). This list is our own summary, not the official USDA map. See how we calculate.
Frequently asked questions
What planting zone is Delaware?
Delaware spans zones 7a to 8a on the 2023 USDA map, and zone 7b is the most common. Look up your ZIP code for your exact zone.
What zone is Wilmington, DE?
Wilmington is zone 7b, where the coldest night of an average winter falls from 5 to 10°F. Plants rated hardy to zone 7 or colder should survive a typical winter there.
More for Delaware: Delaware climate zones (insulation) · Last frost dates in Delaware · Frost line depth by state