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Can You Grow Celeriac in Ontario?

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

Grows well here

Celeriac can work in your zone with an early indoor start — it needs all the growing season you have.

Plant zones

3a–9b

Ontario last frost

mid-April

Ontario first frost

mid-October

Days to harvest

110–120 days

When to plant Celeriacs in Ontario

Start indoors

Feb 3

Transplant

Apr 15

Harvest

Aug 3 – Aug 13

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

About Celeriac

Celeriac (celery root) is a rewarding but demanding crop with a long growing season. The knobbly root has a mild celery-like flavor and stores well all winter.

Start indoors 10-12 weeks before last frost — one of the earliest indoor starts of the season. Transplant after all frost risk. Keep consistently moist. Trim side roots as bulb develops. Harvest before hard freeze.

Full celeriac 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.