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Can You Grow Cucumber in Ontario?

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

Grows well here

Cucumbers grow quickly here — expect harvest within 50-70 days of transplanting after last frost.

Plant zones

3b–11b

Ontario last frost

mid-April

Ontario first frost

mid-October

Days to harvest

50–70 days

When to plant Cucumbers in Ontario

Start indoors

Mar 25

Transplant

Apr 15

Harvest

Jun 4 – Jun 24

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

About Cucumber

Cucumbers are fast-growing warm-season crops that produce heavily once summer heat arrives.

Direct sow or transplant after all frost risk passes — cucumbers hate cold. Keep soil consistently moist. Train vines up a trellis to save space and improve airflow.

Full cucumber 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.

See what grows well in Ontario →

Frequently asked questions

Can you grow Cucumber in Ontario?

Cucumbers grow quickly here — expect harvest within 50-70 days of transplanting after last frost.

What zone is Ontario?

Ontario spans Canadian Zone 5 (3, 4, 5, 6, 7).

When do you plant Cucumbers in Ontario?

Plant Cucumbers around mid-April (start indoors Mar 25), harvest Jun 4 – Jun 24.