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Can You Grow Celery in Ontario?

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

Grows well here

Celery grows well here with a long enough cool season and consistent watering — suited to the patient gardener.

Plant zones

3a–9b

Ontario last frost

mid-April

Ontario first frost

mid-October

Days to harvest

90–120 days

When to plant Celeries in Ontario

Start indoors

Feb 3

Transplant

Apr 15

Harvest

Jul 14 – Aug 13

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

About Celery

Celery is a long-season crop that demands rich, constantly moist soil and a long cool growing period — hard to grow perfectly, but worth it for the flavor.

Start indoors 10-12 weeks before last frost. Blanch stalks by hilling soil or wrapping 2-3 weeks before harvest. Keep soil consistently wet — celery hates drying out.

Full celery 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.