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Hardiness Zone Map
New Hampshire

New Hampshire Planting Zones

New Hampshire covers USDA hardiness zones 4a to 6b on the 2023 map. The most common zone is 6a (43% of ZIP codes), where the coldest winter night averages -10 to -5 °F. Manchester is zone 6a, Nashua is zone 6a and Concord is zone 5b.

Zones in New Hampshire

Share of the state’s ZIP codes in each zone.

4a 2% -30 to -25 °F
4b 4% -25 to -20 °F
5a 21% -20 to -15 °F
5b 30% -15 to -10 °F
6a 43% -10 to -5 °F
6b 1% -5 to 0 °F

Major cities

Manchester 6a
Nashua 6a
Concord 5b
Portsmouth 6a
Rochester 6a
Dover 6a
Tilton 5b
Hampton 6a
Keene 5b
Laconia 5b–6a
Acworth 6a
Alstead 6a

Every city and town in New Hampshire

Acworth 03601 6a
Alstead 03602 6a
Alton 03809 5b
Alton Bay 03810 5b
Amherst 03031 6a
Andover 03216 5b
Antrim 03440 6a
Ashland 03217 5b
Ashuelot 03441 5b
Atkinson 03811 6a
Auburn 03032 6a
Barnstead 03218 5b
Barrington 03825 6a
Bartlett 03812 5a
Bath 03740 5a
Bedford 03110 6a
Belmont 03220 5b
Bennington 03442 5b
Berlin 03570 4b
Bethlehem 03574 5a
Bow 03304 6a
Bradford 03221 5b
Bretton Woods 03575 5a
Bristol 03222 5b
Brookline 03033 6a
Campton 03223 5a
Canaan 03741 5a
Candia 03034 6a
Canterbury 03224 5b
Center Barnstead 03225 5b
Center Conway 03813 5a
Center Harbor 03226 5b
Center Ossipee 03814 5a
Center Sandwich 03227 5b
Center Strafford 03815 6a
Center Tuftonboro 03816 5b
Charlestown 03603 5b
Chester 03036 6a
Chesterfield 03443 6a
Chichester 03258 5b
Chocorua 03817 5a
Claremont 03743 5b
Colebrook 03576 4a
Concord 03301+ 5b
Contoocook 03229 5b
Conway 03818 5a
Cornish 03745 5b
Cornish Flat 03746 5a
Danbury 03230 5a
Danville 03819 6a
Deerfield 03037 6a
Derry 03038 6a
Dover 03820+ 6a
Drewsville 03604 5b
Dublin 03444 6a
Dunbarton 03046 6a
Durham 03824 6a
East Andover 03231 5b
East Candia 03040 6a
East Derry 03041 6a
East Hampstead 03826 6a
East Kingston 03827 6a
East Wakefield 03830 5b
Eaton Center 03832 5a
Effingham 03882 5a
Elkins 03233 5b
Enfield 03748 5a
Enfield Center 03749 5a
Epping 03042 6a
Epsom 03234 5b
Errol 03579 4b
Etna 03750 5a
Exeter 03833 6a
Farmington 03835 6a
Fitzwilliam 03447 6a
Francestown 03043 6a
Franconia 03580 5a
Franklin 03235 5b
Freedom 03836 5a
Fremont 03044 6a
Georges Mills 03751 5b
Gilford 03249 5b
Gilmanton 03237 5b
Gilmanton Iron Works 03837 5b
Gilsum 03448 6a
Glen 03838 5a
Glencliff 03238 5a
Goffstown 03045 6a
Gorham 03581 5a
Goshen 03752 6a
Grafton 03240 5a
Grantham 03753 5a
Greenfield 03047 6a
Greenland 03840 6a
Greenville 03048 6a
Groveton 03582 4b
Guild 03754 5a
Hampstead 03841 6a
Hampton 03842+ 6a
Hampton Falls 03844 6b
Hancock 03449 6a
Hanover 03755 5a
Harrisville 03450 6a
Haverhill 03765 5a
Hebron 03241 5b
Henniker 03242 5b
Hill 03243 5b
Hillsborough 03244 6a
Hinsdale 03451 5b
Holderness 03245 5b
Hollis 03049 6a
Hooksett 03106 6a
Hudson 03051 6a
Intervale 03845 5a
Jackson 03846 5a
Jaffrey 03452 6a
Jefferson 03583 4b
Kearsarge 03847 5b
Keene 03431+ 5b
Kingston 03848 6a
Laconia 03246+ 5b–6a
Lancaster 03584 4b
Lebanon 03766 5a
Lee 03861 6a
Lempster 03605 6a
Lincoln 03251 5a
Lisbon 03585 5a
Litchfield 03052 6a
Littleton 03561 4b
Lochmere 03252 5b
Londonderry 03053 6a
Loudon 03307 5b
Lyme 03768 5a
Lyme Center 03769 5a
Lyndeborough 03082 6a
Madbury 03823 6a
Madison 03849 5a
Manchester 03101+ 6a
Marlborough 03455 6a
Marlow 03456 6a
Melvin Village 03850 5b
Meredith 03253 5b
Meriden 03770 5a
Merrimack 03054 6a
Milan 03588 4b
Milford 03055 6a
Milton 03851 5b
Milton Mills 03852 5b
Mirror Lake 03853 5b
Monroe 03771 4b
Mont Vernon 03057 6a
Moultonborough 03254 5b
Mount Washington 03589 4a
Nashua 03060+ 6a
Nelson 03457 6a
New Boston 03070 6a
New Castle 03854 6a
New Durham 03855 5b
New Hampton 03256 5b
New Ipswich 03071 6a
New London 03257 5b
Newbury 03255 5b
Newfields 03856 6a
Newmarket 03857 6a
Newport 03773 5a
Newton 03858 6a
Newton Junction 03859 6a
North Conway 03860 5a
North Hampton 03862 6a
North Haverhill 03774 5a
North Salem 03073 6a
North Sandwich 03259 5a
North Stratford 03590 4a
North Sutton 03260 5b
North Walpole 03609 5b
North Woodstock 03262 5a
Northwood 03261 6a
Nottingham 03290 6a
Orford 03777 5a
Ossipee 03864 5b
Pelham 03076 6a
Peterborough 03458 6a
Piermont 03779 5a
Pike 03780 5a
Pittsburg 03592 4a
Pittsfield 03263 5b
Plainfield 03781 5a
Plaistow 03865 6a
Plymouth 03264 5b
Portsmouth 03801+ 6a
Randolph 03593 5a
Raymond 03077 6a
Rindge 03461 5b
Rochester 03839+ 6a
Rollinsford 03869 6a
Rumney 03266 5a
Rye 03870 6a
Rye Beach 03871 6a
Salem 03079 6a
Salisbury 03268 5b
Sanbornton 03269 5b
Sanbornville 03872 5b
Sandown 03873 6a
Seabrook 03874 6b
Silver Lake 03875 5a
Somersworth 03878 6a
South Acworth 03607 5b
South Newbury 03272 5b
South Sutton 03273 5b
South Tamworth 03883 5a
Spofford 03462 6a
Springfield 03284 5b
Stoddard 03464 6a
Strafford 03884 6a
Stratham 03885 6a
Sugar Hill 03586 5a
Sullivan 03445 6a
Sunapee 03782 5b
Suncook 03275 6a
Swanzey 03446 5b
Tamworth 03886 5a
Temple 03084 6a
Thornton 03285 5a
Tilton 03276+ 5b
Troy 03465 6a
Twin Mountain 03595 4b
Union 03887 5b
Walpole 03608 5b
Warner 03278 5b
Warren 03279 5a
Washington 03280 6a
Waterville Valley 03215 5a
Weare 03281 6a
Wentworth 03282 5a
West Chesterfield 03466 5b
West Lebanon 03784 5a
West Nottingham 03291 6a
West Ossipee 03890 5a
West Peterborough 03468 5b
West Stewartstown 03597 4a
West Swanzey 03469 5b
Westmoreland 03467 5b
Whitefield 03598 4b
Wilmot 03287 5b
Wilton 03086 6a
Winchester 03470 6a
Windham 03087 6a
Winnisquam 03289 5b
Wolfeboro 03894 5b
Wolfeboro Falls 03896 5b
Wonalancet 03897 5a
Woodstock 03293 5b
Woodsville 03785 5a

Other states

Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware District of Columbia Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada 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 New Hampshire?

New Hampshire spans zones 4a–6b. Zone 6a is the most common, covering 43% of the state's ZIP codes. Enter your ZIP code above for your exact zone.

What planting zone is Manchester, NH?

Manchester is in USDA zone 6a. Its average coldest winter night is -10 to -5 °F.

What planting zone is Nashua, NH?

Nashua is in USDA zone 6a. Its average coldest winter night is -10 to -5 °F.

What planting zone is Concord, NH?

Concord is in USDA zone 5b. Its average coldest winter night is -15 to -10 °F.

What is the coldest zone in New Hampshire?

The coldest part of New Hampshire is zone 4a, with winter lows of -30 to -25 °F. The warmest is zone 6b, at -5 to 0 °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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