Interactive Gardening and Plant Hardiness Zone Map for Ontario, Canada

Using historical climate data, this interactive map created by Plantmaps covers the province of Ontario which ranges from Zone 2a to Zone 7b.

Hardiness Zone 6a

-10°F to -5°F

Hardiness Zone 6b

-5°F to 0°F

Hardiness Zone 7a

0°F to 5°F

Hardiness Zone 5b

-15°F to -10°F

Hardiness Zone 5a

-20°F to -15°F

Hardiness Zone 4b

-25°F to -20°F

Hardiness Zone 4a

-30°F to -25°F

Hardiness Zone 3b

-35°F to -30°F

Hardiness Zone 3a

-40°F to -35°F

Hardiness Zone 2b

-45°F to -40°F

Hardiness Zone 2a

-50°F to -45°F

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. The zones define a minimum range of temperatures that a plant or tree can survive safely in that zone.

Zone Maps for Adjacent Provinces and States

Quebec Zone Map
Manitoba Zone Map
Michigan Zone Map
Minnesota Zone Map
New York Zone Map

Other Interactive Gardening Maps and Data for Ontario

Ontario Drought Conditions Map
Map of Ontario Record High/Low Temperatures
Ontario First Frost Date Map
Ontario Last Frost Date Map

Zoom to Major Cities in Ontario

Zoom to Ajax, ON Hardiness Zone 5bAjax - Hardiness Zone 5b
Zoom to Amherstburg, ON Hardiness Zone 6bAmherstburg - Hardiness Zone 6b
Zoom to Barrie, ON Hardiness Zone 5aBarrie - Hardiness Zone 5a
Zoom to Belleville, ON Hardiness Zone 5bBelleville - Hardiness Zone 5b
Zoom to Brampton, ON Hardiness Zone 5bBrampton - Hardiness Zone 5b
Zoom to Brantford, ON Hardiness Zone 6aBrantford - Hardiness Zone 6a
Zoom to Brockville, ON Hardiness Zone 5aBrockville - Hardiness Zone 5a
Zoom to Burlington, ON Hardiness Zone 6bBurlington - Hardiness Zone 6b
Zoom to Cambridge, ON Hardiness Zone 6aCambridge - Hardiness Zone 6a
Zoom to Chatham, ON Hardiness Zone 6bChatham - Hardiness Zone 6b
Zoom to Cobourg, ON Hardiness Zone 5bCobourg - Hardiness Zone 5b
Zoom to Cornwall, ON Hardiness Zone 5aCornwall - Hardiness Zone 5a
Zoom to Delhi, ON Hardiness Zone 6aDelhi - Hardiness Zone 6a
Zoom to Dryden, ON Hardiness Zone 3aDryden - Hardiness Zone 3a
Zoom to Dundas, ON Hardiness Zone 6bDundas - Hardiness Zone 6b
Zoom to Elliot Lake, ON Hardiness Zone 4bElliot Lake - Hardiness Zone 4b
Zoom to Essex, ON Hardiness Zone 6bEssex - Hardiness Zone 6b
Zoom to Etobicoke, ON Hardiness Zone 6aEtobicoke - Hardiness Zone 6a
Zoom to Fort Erie, ON Hardiness Zone 6bFort Erie - Hardiness Zone 6b
Zoom to Fort Frances, ON Hardiness Zone 3bFort Frances - Hardiness Zone 3b
Zoom to Gananoque, ON Hardiness Zone 5aGananoque - Hardiness Zone 5a
Zoom to Grimsby, ON Hardiness Zone 6bGrimsby - Hardiness Zone 6b
Zoom to Guelph, ON Hardiness Zone 5bGuelph - Hardiness Zone 5b
Zoom to Hamilton, ON Hardiness Zone 6bHamilton - Hardiness Zone 6b
Zoom to Hawkesbury, ON Hardiness Zone 4bHawkesbury - Hardiness Zone 4b
Zoom to Huntsville, ON Hardiness Zone 4aHuntsville - Hardiness Zone 4a
Zoom to Kanata, ON Hardiness Zone 4bKanata - Hardiness Zone 4b
Zoom to Kenora, ON Hardiness Zone 3bKenora - Hardiness Zone 3b
Zoom to Kingston, ON Hardiness Zone 5bKingston - Hardiness Zone 5b
Zoom to Kitchener, ON Hardiness Zone 6aKitchener - Hardiness Zone 6a
Zoom to Leamington, ON Hardiness Zone 6bLeamington - Hardiness Zone 6b
Zoom to Lindsay, ON Hardiness Zone 5aLindsay - Hardiness Zone 5a
Zoom to London, ON Hardiness Zone 6aLondon - Hardiness Zone 6a
Zoom to MacKenzie, ON Hardiness Zone 4aMacKenzie - Hardiness Zone 4a
Zoom to Markham, ON Hardiness Zone 5bMarkham - Hardiness Zone 5b
Zoom to Milton, ON Hardiness Zone 6aMilton - Hardiness Zone 6a
Zoom to Mississauga, ON Hardiness Zone 6aMississauga - Hardiness Zone 6a
Zoom to Nanticoke, ON Hardiness Zone 6aNanticoke - Hardiness Zone 6a
Zoom to Newmarket, ON Hardiness Zone 5bNewmarket - Hardiness Zone 5b
Zoom to Niagara Falls, ON Hardiness Zone 6bNiagara Falls - Hardiness Zone 6b
Zoom to North Bay, ON Hardiness Zone 4aNorth Bay - Hardiness Zone 4a
Zoom to North York, ON Hardiness Zone 6aNorth York - Hardiness Zone 6a
Zoom to Oakville, ON Hardiness Zone 6aOakville - Hardiness Zone 6a
Zoom to Orillia, ON Hardiness Zone 5aOrillia - Hardiness Zone 5a
Zoom to Oshawa, ON Hardiness Zone 5bOshawa - Hardiness Zone 5b
Zoom to Ottawa, ON Hardiness Zone 4bOttawa - Hardiness Zone 4b
Zoom to Owen Sound, ON Hardiness Zone 6aOwen Sound - Hardiness Zone 6a
Zoom to Parry Sound, ON Hardiness Zone 4bParry Sound - Hardiness Zone 4b
Zoom to Pembroke, ON Hardiness Zone 4aPembroke - Hardiness Zone 4a
Zoom to Petawawa, ON Hardiness Zone 4aPetawawa - Hardiness Zone 4a
Zoom to Peterborough, ON Hardiness Zone 5bPeterborough - Hardiness Zone 5b
Zoom to Pickering, ON Hardiness Zone 5bPickering - Hardiness Zone 5b
Zoom to Port Colborne, ON Hardiness Zone 6bPort Colborne - Hardiness Zone 6b
Zoom to Richmond Hill, ON Hardiness Zone 5bRichmond Hill - Hardiness Zone 5b
Zoom to Saint Catharines, ON Hardiness Zone 7aSaint Catharines - Hardiness Zone 7a
Zoom to Sarnia, ON Hardiness Zone 6bSarnia - Hardiness Zone 6b
Zoom to Sault Ste Marie, ON Hardiness Zone 5aSault Ste Marie - Hardiness Zone 5a
Zoom to Scarborough, ON Hardiness Zone 6aScarborough - Hardiness Zone 6a
Zoom to Simcoe, ON Hardiness Zone 6aSimcoe - Hardiness Zone 6a
Zoom to Stoney Creek, ON Hardiness Zone 6bStoney Creek - Hardiness Zone 6b
Zoom to Sturgeon Falls, ON Hardiness Zone 3aSturgeon Falls - Hardiness Zone 3a
Zoom to Sudbury, ON Hardiness Zone 3bSudbury - Hardiness Zone 3b
Zoom to Thorold, ON Hardiness Zone 6bThorold - Hardiness Zone 6b
Zoom to Thunder Bay, ON Hardiness Zone 4aThunder Bay - Hardiness Zone 4a
Zoom to Tillsonburg, ON Hardiness Zone 6aTillsonburg - Hardiness Zone 6a
Zoom to Timmins, ON Hardiness Zone 4aTimmins - Hardiness Zone 4a
Zoom to Toronto, ON Hardiness Zone 6bToronto - Hardiness Zone 6b
Zoom to Trenton, ON Hardiness Zone 5bTrenton - Hardiness Zone 5b
Zoom to Waterloo, ON Hardiness Zone 6aWaterloo - Hardiness Zone 6a
Zoom to Welland, ON Hardiness Zone 6bWelland - Hardiness Zone 6b
Zoom to Whitby, ON Hardiness Zone 5bWhitby - Hardiness Zone 5b
Zoom to Windsor, ON Hardiness Zone 6bWindsor - Hardiness Zone 6b
Zoom to Woodstock, ON Hardiness Zone 6aWoodstock - Hardiness Zone 6a