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Can You Grow Horseradish in Ontario?

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

Grows well here

Horseradish grows well here and is virtually impossible to kill — a great low-effort perennial.

Plant zones

3a–9a

Ontario last frost

mid-April

Ontario first frost

mid-October

Days to harvest

300–365 days

When to plant Horseradishes in Ontario

Direct sow

Oct 1 – Oct 31

Harvest

Jun – Jul (following year)

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

About Horseradish

Horseradish is a vigorous, nearly indestructible perennial grown for its pungent taproot — the fresh stuff blows store-bought away. Plant it where you want it to stay.

Plant root cuttings in spring, burying on a slight angle. Harvest roots in fall after a few frosts for best heat. It spreads — contain it in a pot or dedicated bed.

Full horseradish 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.