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Delaware Planting Zones
Delaware covers USDA hardiness zones 7a to 8a on the 2023 map. The most common zone is 7b (95% of ZIP codes), where the coldest winter night averages 5 to 10 °F. Wilmington is zone 7b, Newark is zone 7b and Dover is zone 7b.
Zones in Delaware
Share of the state’s ZIP codes in each zone.
Major cities
- Wilmington 7b
- Newark 7b
- Dover 7b
- New Castle 7b
- Bear 7b
- Bethany Beach 8a
- Bethel 7b
- Bridgeville 7b
- Camden Wyoming 7b
- Cheswold 7b
- Claymont 7b
- Clayton 7b
Every city and town in Delaware
- Bear 19701 7b
- Bethany Beach 19930 8a
- Bethel 19931 7b
- Bridgeville 19933 7b
- Camden Wyoming 19934 7b
- Cheswold 19936 7b
- Claymont 19703 7b
- Clayton 19938 7b
- Dagsboro 19939 7b
- Delaware City 19706 7b
- Delmar 19940 7b
- Dover 19901+ 7b
- Dover Afb 19902 7b
- Ellendale 19941 7b
- Felton 19943 7b
- Fenwick Island 19944 8a
- Frankford 19945 7b
- Frederica 19946 7b
- Georgetown 19947 7b
- Greenwood 19950 7b
- Harbeson 19951 7b
- Harrington 19952 7b
- Hartly 19953 7b
- Hockessin 19707 7a
- Houston 19954 7b
- Kenton 19955 7b
- Kirkwood 19708 7b
- Laurel 19956 7b
- Lewes 19958 7b
- Lincoln 19960 7b
- Little Creek 19961 7b
- Magnolia 19962 7b
- Marydel 19964 7b
- Middletown 19709 7b
- Milford 19963 7b
- Millsboro 19966 7b
- Millville 19967 7b
- Milton 19968 7b
- Montchanin 19710 7b
- Nassau 19969 7b
- New Castle 19720+ 7b
- Newark 19702+ 7b
- Ocean View 19970 8a
- Odessa 19730 7b
- Port Penn 19731 7b
- Rehoboth Beach 19971 8a
- Rockland 19732 7b
- Seaford 19973 7b
- Selbyville 19975 7b
- Smyrna 19977 7b
- Townsend 19734 7b
- Viola 19979 7b
- Wilmington 19801+ 7b
- Winterthur 19735 7b
Other states
Alabama Alaska Arizona Arkansas California Colorado Connecticut District of Columbia Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Puerto Rico Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming
Zones: 2023 USDA Plant Hardiness Zone Map ZIP code data, USDA Agricultural Research Service and the PRISM Climate Group, Oregon State University (official map). Place names: GeoNames (CC BY 4.0). Each ZIP code gets one zone, but a ZIP code can cross a zone line, and hills, valleys and towns can be warmer or colder than the zone shown.
About the Hardiness Zone Map
The Hardiness Zone Map finds your USDA plant hardiness zone, also called your planting or growing zone, from your ZIP code. Zones are based on the average coldest winter night of the year: each zone is 10 °F wide and split into a and b halves of 5 °F, from zone 1a in Alaska to 13b in Puerto Rico. Plant labels and seed packets give the coldest zone a plant can survive, so knowing your zone tells you which perennials, shrubs and trees can stay outside all winter. Zones come from the official 2023 USDA map ZIP code data for all 50 states, Washington DC and Puerto Rico.
How to use it
- 1 Enter your 5-digit ZIP code and press Find my zone.
- 2 Read your zone and the average coldest winter temperature it stands for.
- 3 Open your state to see its zones and the zone of every city.
- 4 Choose plants rated for your zone number or a colder (lower) one.
Frequently asked questions
What growing zone is Delaware?
Delaware spans zones 7a–8a. Zone 7b is the most common, covering 95% of the state's ZIP codes. Enter your ZIP code above for your exact zone.
What planting zone is Wilmington, DE?
Wilmington is in USDA zone 7b. Its average coldest winter night is 5 to 10 °F.
What planting zone is Newark, DE?
Newark is in USDA zone 7b. Its average coldest winter night is 5 to 10 °F.
What planting zone is Dover, DE?
Dover is in USDA zone 7b. Its average coldest winter night is 5 to 10 °F.
What is the coldest zone in Delaware?
The coldest part of Delaware is zone 7a, with winter lows of 0 to 5 °F. The warmest is zone 8a, at 10 to 15 °F.
How are planting zones worked out?
Each zone is a 10 °F band of the average coldest winter night over 1991–2020, split into a and b halves of 5 °F. The map does not show summer heat, rainfall or frost dates, so check local advice before planting.
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