Maryland Hardiness Zones

Maryland covers USDA plant hardiness zones 6a to 8a on the 2023 map, so its coldest areas average −10 to −5 °F on the coldest winter night. Find your zone by ZIP code, or pick a city below for its zone, sunrise and daylight by month.

Maryland hardiness zone map

5b6a6b7a7b8a

This is not the official USDA Plant Hardiness Zone Map. Zones are derived from the official 2023 dataset, resampled to about 2 km. Dots mark cities with their own page.

Source: USDA Plant Hardiness Zone Map, 2023. Agricultural Research Service, U.S. Department of Agriculture, planthardiness.ars.usda.gov. Underlying data © PRISM Group, Oregon State University, prism.oregonstate.edu, accessed 2026-08-30.

Zones and daylight by city

City	Zone	Coldest night	Longest day	Shortest day
Baltimore	8a	10 to 15 °F	14h 56m	9h 24m
Columbia	7b	5 to 10 °F	14h 56m	9h 25m
Germantown	7b	5 to 10 °F	14h 56m	9h 25m
Silver Spring	7b	5 to 10 °F	14h 55m	9h 26m
Frederick	7b	5 to 10 °F	14h 57m	9h 23m
Rockville	7b	5 to 10 °F	14h 55m	9h 25m
Gaithersburg	7b	5 to 10 °F	14h 56m	9h 25m
Annapolis	8a	10 to 15 °F	14h 54m	9h 26m
Hagerstown	7a	0 to 5 °F	14h 59m	9h 22m

Gardening in Maryland?

Your zone says what survives winter. Deconstruct Sun measures how many hours of direct sun your exact spot gets, so you can pick plants that thrive. Free on iPhone.

Questions

What hardiness zones are in Maryland?

Maryland spans USDA zones 6a to 8a on the 2023 map. Among its larger cities, Hagerstown is coldest (zone 7a) and Baltimore is warmest (zone 8a).

How do I find my exact zone in Maryland?

Enter your ZIP code in the hardiness zone lookup on this site. It reads the 2023 USDA data for that ZIP and warns you if you are near a zone boundary.

How much sun do gardens in Maryland get?

In Baltimore, an open spot gets up to 14.9 hours of daylight in June but only 9.4 in December. Trees and buildings cut that down, especially in winter. The Deconstruct Sun app measures the real direct-sun hours for one exact spot.