Ontario Interactive Plant Hardiness Zone Map

Based on the USDA Hardiness Zone Map Designations, this interactive version covers the Province of Ontario which ranges from USDA Zone 0b to USDA Zone 7a. What are Hardiness Zones, Gardening Zones, Growing Zones and Plant Zones? Hardiness Zones, Gardening Zones, Growing Zones and Plant Zones refer to defined geographic regions that can support specific plants, flowers and trees. T he zones define a minimum range of temperatures that a plant or tree can survive safely in that zone.

Related Ontario Maps:

Plant Hardiness Zone Maps for Neighboring States and Provinces

List of Plant Hardiness Zones for Cities and Towns in Ontario

Location	Hardiness Zone
Acton	Zone 5b: -26.1°C to -23.3°C
Actons Corners	Zone 5b: -26.1°C to -23.3°C
Ajax	Zone 6b: -20.6°C to -17.8°C
Alexandria	Zone 5a: -28.9°C to -26.1°C
Alliston	Zone 5b: -26.1°C to -23.3°C
Almonte	Zone 5a: -28.9°C to -26.1°C
Amherstburg	Zone 7a: -17.8°C to -15°C
Angus	Zone 5b: -26.1°C to -23.3°C
Arnprior	Zone 5a: -28.9°C to -26.1°C
Arthur	Zone 5b: -26.1°C to -23.3°C
Aurora	Zone 5b: -26.1°C to -23.3°C

Aylmer	Zone 6b: -20.6°C to -17.8°C
Azilda	Zone 4b: -31.7°C to -28.9°C
Bala	Zone 5a: -28.9°C to -26.1°C
Ballantrae	Zone 5b: -26.1°C to -23.3°C
Bancroft	Zone 4a: -34.4°C to -31.7°C
Barrie	Zone 5b: -26.1°C to -23.3°C
Barry's Bay	Zone 4a: -34.4°C to -31.7°C
Baysville	Zone 4b: -31.7°C to -28.9°C
Beeton	Zone 5b: -26.1°C to -23.3°C

Belle River	Zone 7a: -17.8°C to -15°C
Belleville	Zone 6a: -23.3°C to -20.6°C
Belmont	Zone 6b: -20.6°C to -17.8°C
Blenheim	Zone 6b: -20.6°C to -17.8°C
Blind River	Zone 5a: -28.9°C to -26.1°C
Bowmanville	Zone 6a: -23.3°C to -20.6°C
Bracebridge	Zone 4b: -31.7°C to -28.9°C
Bradford	Zone 5b: -26.1°C to -23.3°C
Brampton	Zone 5b: -26.1°C to -23.3°C

Branchton	Zone 6a: -23.3°C to -20.6°C
Brantford	Zone 6a: -23.3°C to -20.6°C
Brighton	Zone 6a: -23.3°C to -20.6°C
Brockville	Zone 6a: -23.3°C to -20.6°C
Brooklin	Zone 6a: -23.3°C to -20.6°C
Bruce Mines	Zone 5a: -28.9°C to -26.1°C
Burlington	Zone 6b: -20.6°C to -17.8°C
CFB Petawawa	Zone 4b: -31.7°C to -28.9°C
Caledon	Zone 5b: -26.1°C to -23.3°C
Caledonia	Zone 6b: -20.6°C to -17.8°C
Cambridge	Zone 5b: -26.1°C to -23.3°C
Capreol	Zone 4a: -34.4°C to -31.7°C
Carleton Place	Zone 5a: -28.9°C to -26.1°C
Carlisle	Zone 6a: -23.3°C to -20.6°C
Carlow Mayo	Zone 4a: -34.4°C to -31.7°C
Cartier	Zone 4a: -34.4°C to -31.7°C
Casselman	Zone 5a: -28.9°C to -26.1°C
Cayuga	Zone 6b: -20.6°C to -17.8°C
Chatham	Zone 6b: -20.6°C to -17.8°C
Chelmsford	Zone 4b: -31.7°C to -28.9°C
Chesley	Zone 5b: -26.1°C to -23.3°C
Clarence-Rockland	Zone 5a: -28.9°C to -26.1°C
Clinton	Zone 6a: -23.3°C to -20.6°C
Cobalt	Zone 3b: -37.2°C to -34.4°C
Cobourg	Zone 6a: -23.3°C to -20.6°C
Cochrane	Zone 2b: -42.8°C to -40°C
Collingwood	Zone 6a: -23.3°C to -20.6°C
Cornwall	Zone 5b: -26.1°C to -23.3°C
Corunna	Zone 7a: -17.8°C to -15°C
Courtice	Zone 6a: -23.3°C to -20.6°C
Deep River	Zone 4b: -31.7°C to -28.9°C
Delhi	Zone 6a: -23.3°C to -20.6°C
Deseronto	Zone 6a: -23.3°C to -20.6°C
Dorchester	Zone 6b: -20.6°C to -17.8°C
Dorset	Zone 4b: -31.7°C to -28.9°C
Dowling	Zone 4a: -34.4°C to -31.7°C
Dresden	Zone 6b: -20.6°C to -17.8°C
Dryden	Zone 3b: -37.2°C to -34.4°C
Dubreuilville	Zone 3a: -40°C to -37.2°C
Dundas	Zone 6b: -20.6°C to -17.8°C
Dunnville	Zone 6b: -20.6°C to -17.8°C
Durham	Zone 5b: -26.1°C to -23.3°C
Ear Falls	Zone 3b: -37.2°C to -34.4°C
Elliot Lake	Zone 4b: -31.7°C to -28.9°C
Elmira	Zone 5b: -26.1°C to -23.3°C
Elmvale	Zone 5b: -26.1°C to -23.3°C
Embrun	Zone 5b: -26.1°C to -23.3°C
Emeryville	Zone 7a: -17.8°C to -15°C
Emo	Zone 4a: -34.4°C to -31.7°C
Englehart	Zone 3a: -40°C to -37.2°C
Erin	Zone 5b: -26.1°C to -23.3°C
Ernestown	Zone 6a: -23.3°C to -20.6°C
Espanola	Zone 4b: -31.7°C to -28.9°C
Essex	Zone 7a: -17.8°C to -15°C
Exeter	Zone 6a: -23.3°C to -20.6°C
Faraday	Zone 4a: -34.4°C to -31.7°C
Fenelon Falls	Zone 5a: -28.9°C to -26.1°C
Fennells Corner	Zone 5b: -26.1°C to -23.3°C
Fergus	Zone 5b: -26.1°C to -23.3°C
Fordwich	Zone 5b: -26.1°C to -23.3°C
Fort Albany	Zone 1b: -48.3°C to -45.6°C
Fort Erie	Zone 6b: -20.6°C to -17.8°C
Fort Frances	Zone 4a: -34.4°C to -31.7°C
Fort Severn	Zone 1a: -51.1°C to -48.3°C
Freelton	Zone 6a: -23.3°C to -20.6°C
Galt	Zone 6a: -23.3°C to -20.6°C
Gananoque	Zone 6a: -23.3°C to -20.6°C
Georgetown	Zone 5b: -26.1°C to -23.3°C
Geraldton	Zone 2b: -42.8°C to -40°C
Glencoe	Zone 6b: -20.6°C to -17.8°C
Goderich	Zone 6a: -23.3°C to -20.6°C
Grafton	Zone 6a: -23.3°C to -20.6°C
Gravenhurst	Zone 5a: -28.9°C to -26.1°C
Grimsby	Zone 7a: -17.8°C to -15°C
Guelph	Zone 5b: -26.1°C to -23.3°C
Hagersville	Zone 6b: -20.6°C to -17.8°C
Haileybury	Zone 3b: -37.2°C to -34.4°C
Haliburton	Zone 4b: -31.7°C to -28.9°C
Hamilton	Zone 6b: -20.6°C to -17.8°C
Hanmer	Zone 4b: -31.7°C to -28.9°C
Hanover	Zone 5b: -26.1°C to -23.3°C
Harrow	Zone 7a: -17.8°C to -15°C
Harrowsmith	Zone 5b: -26.1°C to -23.3°C
Hawkesbury	Zone 5a: -28.9°C to -26.1°C
Hawkesbury	Zone 5a: -28.9°C to -26.1°C
Hearst	Zone 2a: -45.6°C to -42.8°C
Hespeler	Zone 5b: -26.1°C to -23.3°C
Holland Landing	Zone 5b: -26.1°C to -23.3°C
Huntsville	Zone 4b: -31.7°C to -28.9°C
Huron Shores	Zone 4b: -31.7°C to -28.9°C
Ignace	Zone 3b: -37.2°C to -34.4°C
Ingersoll	Zone 6a: -23.3°C to -20.6°C
Ingleside	Zone 5b: -26.1°C to -23.3°C
Ingolf	Zone 3b: -37.2°C to -34.4°C
Iron Bridge	Zone 5a: -28.9°C to -26.1°C
Iroquois Falls	Zone 2b: -42.8°C to -40°C
Kanata	Zone 5b: -26.1°C to -23.3°C
Kapuskasing	Zone 2b: -42.8°C to -40°C
Kapuskasing	Zone 2b: -42.8°C to -40°C
Kearney	Zone 4b: -31.7°C to -28.9°C
Kemptville	Zone 5b: -26.1°C to -23.3°C
Kenora	Zone 4a: -34.4°C to -31.7°C
Keswick	Zone 5b: -26.1°C to -23.3°C
Kinburn	Zone 5a: -28.9°C to -26.1°C
Kincardine	Zone 6a: -23.3°C to -20.6°C
King City	Zone 5b: -26.1°C to -23.3°C
Kingston	Zone 6a: -23.3°C to -20.6°C
Kirkland Lake	Zone 3a: -40°C to -37.2°C
Kitchener	Zone 5b: -26.1°C to -23.3°C
LaSalle	Zone 7a: -17.8°C to -15°C
Lakefield	Zone 5b: -26.1°C to -23.3°C
Lanark	Zone 5a: -28.9°C to -26.1°C
Lansdowne	Zone 6a: -23.3°C to -20.6°C
Leamington	Zone 7a: -17.8°C to -15°C
Lefaivre	Zone 5a: -28.9°C to -26.1°C
Lefaivre	Zone 5a: -28.9°C to -26.1°C
Levack	Zone 4a: -34.4°C to -31.7°C
Limerick	Zone 4b: -31.7°C to -28.9°C
Lincoln	Zone 6b: -20.6°C to -17.8°C
Lindsay	Zone 5b: -26.1°C to -23.3°C
Listowel	Zone 5b: -26.1°C to -23.3°C
Little Current	Zone 5a: -28.9°C to -26.1°C
London	Zone 6b: -20.6°C to -17.8°C
Longlac	Zone 2b: -42.8°C to -40°C
MacTier	Zone 5a: -28.9°C to -26.1°C
Manotick	Zone 5b: -26.1°C to -23.3°C
Marathon	Zone 3b: -37.2°C to -34.4°C
Markham	Zone 6a: -23.3°C to -20.6°C
Marmora	Zone 5b: -26.1°C to -23.3°C
Massey	Zone 4b: -31.7°C to -28.9°C
Matachewan	Zone 3a: -40°C to -37.2°C
Mattawa	Zone 4b: -31.7°C to -28.9°C
Mattawa	Zone 4b: -31.7°C to -28.9°C
Maynooth	Zone 4a: -34.4°C to -31.7°C
Meaford	Zone 6a: -23.3°C to -20.6°C
Merrickville	Zone 5b: -26.1°C to -23.3°C
Metcalfe	Zone 5b: -26.1°C to -23.3°C
Midland	Zone 5b: -26.1°C to -23.3°C
Milton	Zone 6a: -23.3°C to -20.6°C
Minden	Zone 4b: -31.7°C to -28.9°C
Mississauga	Zone 6a: -23.3°C to -20.6°C
Mitchell	Zone 6a: -23.3°C to -20.6°C
Moose Factory	Zone 1b: -48.3°C to -45.6°C
Moosonee	Zone 1b: -48.3°C to -45.6°C
Morrisburg	Zone 5a: -28.9°C to -26.1°C
Mount Albert	Zone 5b: -26.1°C to -23.3°C
Mount Forest	Zone 5b: -26.1°C to -23.3°C
Napanee	Zone 6a: -23.3°C to -20.6°C
Nepean	Zone 5b: -26.1°C to -23.3°C
New Hamburg	Zone 6a: -23.3°C to -20.6°C
New Liskeard	Zone 3b: -37.2°C to -34.4°C
Newcastle	Zone 6a: -23.3°C to -20.6°C
Newmarket	Zone 5b: -26.1°C to -23.3°C
Newton Robinson	Zone 5b: -26.1°C to -23.3°C
Niagara Falls	Zone 6b: -20.6°C to -17.8°C
Niagara-on-the-Lake	Zone 7a: -17.8°C to -15°C
Nipigon	Zone 3a: -40°C to -37.2°C
North Bay	Zone 4b: -31.7°C to -28.9°C
North Cobalt	Zone 3b: -37.2°C to -34.4°C
Northshore	Zone 5a: -28.9°C to -26.1°C
Norwich	Zone 6a: -23.3°C to -20.6°C
Oakville	Zone 6b: -20.6°C to -17.8°C
Onaping	Zone 4a: -34.4°C to -31.7°C
Orangeville	Zone 5a: -28.9°C to -26.1°C
Orillia	Zone 5b: -26.1°C to -23.3°C
Oshawa	Zone 6a: -23.3°C to -20.6°C
Ottawa	Zone 5b: -26.1°C to -23.3°C
Owen Sound	Zone 6a: -23.3°C to -20.6°C
Paisley	Zone 5b: -26.1°C to -23.3°C
Palmerston	Zone 5b: -26.1°C to -23.3°C
Paris	Zone 6a: -23.3°C to -20.6°C
Parry Sound	Zone 5b: -26.1°C to -23.3°C
Peawanuck	Zone 0b: -53.9°C to -51.1°C
Pelham	Zone 6b: -20.6°C to -17.8°C
Pembroke	Zone 4b: -31.7°C to -28.9°C
Penetanguishene	Zone 5b: -26.1°C to -23.3°C
Perth	Zone 5b: -26.1°C to -23.3°C
Petawawa	Zone 4b: -31.7°C to -28.9°C
Peterborough	Zone 5b: -26.1°C to -23.3°C
Petrolia	Zone 6b: -20.6°C to -17.8°C
Pickering	Zone 6b: -20.6°C to -17.8°C
Picton	Zone 6a: -23.3°C to -20.6°C
Pikangikum	Zone 2b: -42.8°C to -40°C
Pleasant Point	Zone 5a: -28.9°C to -26.1°C
Port Carling	Zone 5a: -28.9°C to -26.1°C
Port Colborne	Zone 6b: -20.6°C to -17.8°C
Port Dover	Zone 6b: -20.6°C to -17.8°C
Port Elgin	Zone 6a: -23.3°C to -20.6°C
Port Hope	Zone 6a: -23.3°C to -20.6°C
Port Lambton	Zone 7a: -17.8°C to -15°C
Port Perry	Zone 5b: -26.1°C to -23.3°C
Port Stanley	Zone 6b: -20.6°C to -17.8°C
Powassan	Zone 4b: -31.7°C to -28.9°C
Prescott	Zone 5b: -26.1°C to -23.3°C
Preston	Zone 6a: -23.3°C to -20.6°C
Prince Edward County	Zone 6a: -23.3°C to -20.6°C
Queensville	Zone 5b: -26.1°C to -23.3°C
Red Lake	Zone 3a: -40°C to -37.2°C
Red Rock	Zone 3a: -40°C to -37.2°C
Renfrew	Zone 5a: -28.9°C to -26.1°C
Richmond Hill	Zone 6a: -23.3°C to -20.6°C
Ridgetown	Zone 6b: -20.6°C to -17.8°C
Rockton	Zone 6a: -23.3°C to -20.6°C
Rockwood	Zone 5b: -26.1°C to -23.3°C
Russell	Zone 5b: -26.1°C to -23.3°C
Sandy Lake	Zone 2b: -42.8°C to -40°C
Sarnia	Zone 6b: -20.6°C to -17.8°C
Sauble Beach	Zone 6a: -23.3°C to -20.6°C
Sault Ste. Marie	Zone 4b: -31.7°C to -28.9°C
Sault Ste. Marie	Zone 4b: -31.7°C to -28.9°C
Schreiber	Zone 3a: -40°C to -37.2°C
Seaforth	Zone 6a: -23.3°C to -20.6°C
Shannonville	Zone 6a: -23.3°C to -20.6°C
Sheffield	Zone 6a: -23.3°C to -20.6°C
Shelburne	Zone 5a: -28.9°C to -26.1°C
Simcoe	Zone 6b: -20.6°C to -17.8°C
Sioux Narrows	Zone 4a: -34.4°C to -31.7°C
Skead	Zone 4b: -31.7°C to -28.9°C
Smiths Falls	Zone 5b: -26.1°C to -23.3°C
Smooth Rock Falls	Zone 2b: -42.8°C to -40°C
Southampton	Zone 6a: -23.3°C to -20.6°C
St Thomas	Zone 6a: -23.3°C to -20.6°C
St. Catharines	Zone 7a: -17.8°C to -15°C
St. Marys	Zone 6a: -23.3°C to -20.6°C
Stayner	Zone 5b: -26.1°C to -23.3°C
Stittsville	Zone 5b: -26.1°C to -23.3°C
Stoney Creek	Zone 6b: -20.6°C to -17.8°C
Stouffville	Zone 6a: -23.3°C to -20.6°C
Stratford	Zone 6a: -23.3°C to -20.6°C
Strathroy	Zone 6b: -20.6°C to -17.8°C
Sturgeon Falls	Zone 4b: -31.7°C to -28.9°C
Sudbury	Zone 4b: -31.7°C to -28.9°C
Sutton	Zone 5b: -26.1°C to -23.3°C
Sutton West	Zone 5b: -26.1°C to -23.3°C
Tavistock	Zone 6a: -23.3°C to -20.6°C
Tecumseh	Zone 7a: -17.8°C to -15°C
Temagami	Zone 3b: -37.2°C to -34.4°C
Temiskaming Shores	Zone 3b: -37.2°C to -34.4°C
Terrace Bay	Zone 3b: -37.2°C to -34.4°C
Thessalon	Zone 5a: -28.9°C to -26.1°C
Thornbury	Zone 6a: -23.3°C to -20.6°C
Thorold	Zone 6b: -20.6°C to -17.8°C
Thunder Bay	Zone 3b: -37.2°C to -34.4°C
Tillsonburg	Zone 6b: -20.6°C to -17.8°C
Timmins	Zone 3a: -40°C to -37.2°C
Toronto	Zone 6b: -20.6°C to -17.8°C
Toronto Islands	Zone 7a: -17.8°C to -15°C
Trenton	Zone 6a: -23.3°C to -20.6°C
Tudor and Cashel	Zone 5a: -28.9°C to -26.1°C
Tweed	Zone 5b: -26.1°C to -23.3°C
Tyendinaga	Zone 6a: -23.3°C to -20.6°C
Uxbridge	Zone 5b: -26.1°C to -23.3°C
Val Caron	Zone 4b: -31.7°C to -28.9°C
Val Therese	Zone 4b: -31.7°C to -28.9°C
Vandorf	Zone 5b: -26.1°C to -23.3°C
Vaughan	Zone 6a: -23.3°C to -20.6°C
Victoria Harbour	Zone 5b: -26.1°C to -23.3°C
Wainfleet Township	Zone 6b: -20.6°C to -17.8°C
Walkerton	Zone 5b: -26.1°C to -23.3°C
Wallaceburg	Zone 6b: -20.6°C to -17.8°C
Wasaga Beach	Zone 6a: -23.3°C to -20.6°C
Waterdown	Zone 6a: -23.3°C to -20.6°C
Waterford	Zone 6a: -23.3°C to -20.6°C
Waterloo	Zone 5b: -26.1°C to -23.3°C
Wawa	Zone 3b: -37.2°C to -34.4°C
Welland	Zone 6b: -20.6°C to -17.8°C
West Lincoln Township	Zone 6b: -20.6°C to -17.8°C
Wheatley	Zone 7a: -17.8°C to -15°C
Whitby	Zone 6a: -23.3°C to -20.6°C
Wiarton	Zone 6a: -23.3°C to -20.6°C
Williamsburg	Zone 5a: -28.9°C to -26.1°C
Winchester	Zone 5a: -28.9°C to -26.1°C
Windsor	Zone 7a: -17.8°C to -15°C
Winona	Zone 7a: -17.8°C to -15°C
Wollaston	Zone 4b: -31.7°C to -28.9°C
Woodstock	Zone 6a: -23.3°C to -20.6°C

Ontario Plant Hardiness Zone Map

Related Ontario Maps:

Plant Hardiness Zone Maps for Neighboring States and Provinces

List of Plant Hardiness Zones for Cities and Towns in Ontario