Regional guides

Browse by hardiness zone

Your zone is the single number that says most about what you can grow, when your season starts and ends, and what the land and water around you offer. Pick your zone below, or search a town, postal code or zone number.

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See the zones on a map of Canada and the US

Official USDA 2023 and Natural Resources Canada zones. Click anywhere for the zone, region and local guide.

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Zone 2

−45 to −40°C

The far north: a sprint of a season under very long days.

Frost-free days: 60–90 · 5 regions

Yellowknife, NT, Whitehorse, YT, Thompson, MB, Fort McMurray, AB, Fairbanks, AK

Zone 3

−40 to −34°C

Northern prairie and boreal edge: cold winters, hot bright summers.

Frost-free days: 90–115 · 8 regions

Edmonton, AB, Saskatoon, SK, Regina, SK, Prince George, BC, Timmins, ON…

Zone 4

−34 to −29°C

Cold and reliable: real winters, a full four-month season.

Frost-free days: 110–140 · 11 regions

Calgary, AB, Winnipeg, MB, Thunder Bay, ON, Sudbury, ON, Québec City, QC…

Zone 5

−29 to −23°C

The heart of Canadian and northern US gardening.

Frost-free days: 140–165 · 16 regions

Ottawa, ON, Montréal, QC, Sherbrooke, QC, Kingston, ON, Fredericton, NB…

Zone 6

−23 to −18°C

Great Lakes and Northeast: long enough for almost everything.

Frost-free days: 160–190 · 15 regions

Toronto, ON, Hamilton, ON, London, ON, Halifax, NS, Saint John, NB…

Zone 7

−18 to −12°C

Mid-Atlantic, Upper South and the sheltered corners of Canada.

Frost-free days: 180–220 · 14 regions

Windsor, ON, Niagara-on-the-Lake, ON, Kelowna, BC, New York, NY, Philadelphia, PA…

Zone 8

−12 to −7°C

Two very different zone 8s: the mild Pacific Northwest and the hot South.

Frost-free days: 210–260 · 11 regions

Vancouver, BC, Nanaimo, BC, Seattle, WA, Portland, OR, Atlanta, GA…

Zone 9

−7 to −1°C

Nearly frost-free: gardening flips to a winter-centred year.

Frost-free days: 260–330 · 13 regions

Victoria, BC, Austin, TX, Houston, TX, San Antonio, TX, New Orleans, LA…

Zone 10

−1 to 4°C

Subtropical: no real winter, and a summer you garden around.

Frost-free days: 330–365 · 8 regions

Miami, FL, Fort Lauderdale, FL, Tampa, FL, Fort Myers, FL, Los Angeles, CA…

All regions

Every region, by zone

Zone 2 −50 to −40°F

Zone 3 −40 to −30°F

Zone 4 −30 to −20°F

Zone 5 −20 to −10°F

Zone 6 −10 to 0°F

Zone 7 0 to 10°F

Zone 8 10 to 20°F

Zone 9 20 to 30°F

Zone 10 30 to 40°F

101 regions listed. Zone assignments are approximate — many cities straddle two half-zones and microclimates vary by neighbourhood. Each local guide estimates the zone for your exact location from ten years of climate data.