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Can You Grow Kale in Ontario?

Canada · Canadian Zone 5 · zones 3, 4, 5, 6, 7

Grows well here

Kale grows exceptionally well here — it is one of the most cold-tolerant vegetables available.

Plant zones

2a–9b

Ontario last frost

mid-April

Ontario first frost

mid-October

Days to harvest

55–75 days

When to plant Kales in Ontario

Start indoors

Mar 18

Transplant

Apr 15

Harvest

Jun 9 – Jun 29

Dates are approximate, based on Ontario's average frost dates. Your exact yard may vary by microclimate.

About Kale

Kale is one of the hardiest vegetables available — it survives hard frosts and tastes sweeter after a freeze.

Sow indoors 4-6 weeks before last frost or direct sow in late summer for fall harvest. Harvest outer leaves to keep the plant producing. Cold-hardy varieties survive winter in Zone 7+.

Full kale growing guide →

Gardening in Ontario

Ontario spans several climate zones. Northern Ontario is Zone 3-4 with short seasons; southern Ontario is Zone 5-7 with long productive seasons. The Niagara Peninsula is one of Canada's premier fruit-growing regions.