USDA hardiness zones for Connecticut cities, towns and counties

Connecticut has four USDA planting zones, ranging from 6a to 7b, according to the USDA’s latest plant hardiness zone map released in 2023.

You can find your USDA Hardiness zone in Connecticut using the complete list of Connecticut cities, towns and counties planting zones given below. You can also make use of our Planting Zones by Zipcode search tool or the interactive map, also provided below.

Connecticut Plating Zones by ZipCode

Connecticut Planting Zones Map

USDA hardiness zones for Connecticut counties

Connecticut Counties	Hardiness Zones
Fairfield County	Zone 6a, 6b, 7a and 7b
Hartford County	Zone 5b, 6a, 6b and 7a
Litchfield County	Zone 5b, 6a and 6b
Middlesex County	Zone 6b, 7a and 7b
New Haven County	Zone 6a, 6b, 7a and 7b
Tolland County	Zone 6a and 6b
Windham County	Zone 6a and 6b

USDA hardiness zones for Connecticut cities and towns

Connecticut City/Town	2024 USDA Hardiness Zone(s)
Ansonia	Zone 6b and 7a
Baltic	Zone 6b
Bantam	Zone 6a
Bethel	Zone 6b
Bethlehem Village	Zone 6a and 6b
Blue Hills	Zone 6b
Branford Center	Zone 7a
Bridgeport	Zone 7a
Bristol	Zone 6a and 6b
Broad Brook	Zone 6b
Brooklyn	Zone 6b
Byram	Zone 7b
Canaan	Zone 6a
Cannondale	Zone 6b and 7a
Canton Valley	Zone 6a and 6b
Cheshire Village	Zone 6b
Chester Center	Zone 6b
Clinton	Zone 7a
Colchester	Zone 6b
Collinsville	Zone 6a and 6b
Conning Towers Nautilus Park	Zone 7a
Cos Cob	Zone 7a and 7b
Coventry Lake	Zone 6b
Crystal Lake	Zone 6a and 6b
Danbury	Zone 6b
Deep River Center	Zone 6b and 7a
Derby	Zone 6b and 7a
Durham	Zone 6b
East Brooklyn	Zone 6b
East Hampton	Zone 6b
East Hartford	Zone 6b and 7a
East Haven	Zone 6b, 7a and 7b
Essex Village	Zone 6b and 7a
Falls Village	Zone 6a
Fairfield	Zone 7a and 7b
Fenwick	Zone 7a
Gales Ferry	Zone 7a
Georgetown	Zone 6b
Glastonbury Center	Zone 6b and 7a
Glenville	Zone 7a and 7b
Greenwich	Zone 7a and 7b
Groton	Zone 7a
Groton Long Point	Zone 7a
Guilford Center	Zone 7a
Hartford	Zone 6b and 7a
Hazardville	Zone 6b
Heritage Village	Zone 6b
Jewett City	Zone 6b
Kensington	Zone 6b
Lake Pocotopaug	Zone 6b
Lakeville	Zone 6a
Litchfield	Zone 6a
Long Hill	Zone 7a
Madison Center	Zone 7a
Manchester	Zone 6b
Mansfield Center	Zone 6b
Mashantucket	Zone 6b
Meriden	Zone 6b
Middletown	Zone 6b and 7a
Milford	Zone 7a and 7b
Moodus	Zone 6b
Moosup	Zone 6b
Mystic	Zone 7a
Naugatuck	Zone 6b
New Britain	Zone 6b
New Hartford Center	Zone 6a and 6b
New Haven	Zone 6b and 7a
New London	Zone 7a
New Milford	Zone 6b
New Preston	Zone 6a
Newington	Zone 6b
Newtown	Zone 6b
Niantic	Zone 7a
Noank	Zone 7a
Norfolk	Zone 6a
North Granby	Zone 6a and 6b
North Grosvenor Dale	Zone 6a and 6b
North Haven	Zone 6b and 7a
Northwest Harwinton	Zone 6a
Norwalk	Zone 7a and 7b
Norwich	Zone 6b and 7a
Oakville	Zone 6b
Old Greenwich	Zone 7a and 7b
Old Mystic	Zone 7a
Old Saybrook Center	Zone 7a
Orange	Zone 7a
Oxoboxo River	Zone 6b and 7a
Pawcatuck	Zone 7a
Pemberwick	Zone 7a and 7b
Plainfield Village	Zone 6b
Poquonock Bridge	Zone 7a
Portland	Zone 6b and 7a
Quinebaug	Zone 6a and 6b
Ridgefield	Zone 6b
Riverside	Zone 7a and 7b
Rockville	Zone 6b
Salmon Brook	Zone 6b
Saybrook Manor	Zone 7a
Sharon	Zone 6a
Shelton	Zone 6b and 7a
Sherwood Manor	Zone 6b
Simsbury Center	Zone 6b
Somers	Zone 6b
South Coventry	Zone 6b
South Windham	Zone 6b
South Woodstock	Zone 6a and 6b
Southport	Zone 7a
Southwood Acres	Zone 6b
Stafford Springs	Zone 6a and 6b
Stamford	Zone 6b, 7a and 7b
Stonington	Zone 7a
Storrs	Zone 6b
Suffield Depot	Zone 6b
Tariffville	Zone 6b
Terramuggus	Zone 6b
Thomaston	Zone 6a and 6b
Thompsonville	Zone 6b
Torrington	Zone 6a
Wallingford Center	Zone 6b
Waterbury	Zone 6a and 6b
Waterford	Zone 7a
Watertown	Zone 6b
Wauregan	Zone 6b
Weatogue	Zone 6b
West Hartford	Zone 6a and 6b
West Haven	Zone 7a
West Simsbury	Zone 6a and 6b
Westbrook Center	Zone 7a
Wethersfield	Zone 6b and 7a
Willimantic	Zone 6b
Wilton Center	Zone 7a
Windsor Locks	Zone 6b
Winsted	Zone 6a
Woodbury Center	Zone 6b
Woodmont	Zone 7a