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Can You Grow Mustard Greens in Ontario?

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

Grows well here

Mustard greens grow fast and easy in your zone — two crops per year in spring and fall.

Plant zones

4a–10b

Ontario last frost

mid-April

Ontario first frost

mid-October

Days to harvest

30–40 days

When to plant Mustard Greenses in Ontario

Direct sow

Apr 15

Harvest

May 15 – May 25

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

About Mustard Greens

Mustard greens are one of the fastest crops in the garden — ready in 4-6 weeks with a spicy, peppery kick. Huge in Southern US, Indian, and Asian cuisines.

Direct sow in early spring or fall — hot weather triggers bolting and extreme bitterness. Harvest outer leaves continuously. Baby leaves at 3 weeks are excellent for salads. Grows well indoors under lights.

Full mustard greens 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.