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Can You Grow Broccoli in Ontario?
Canada · Canadian Zone 5 · zones 3, 4, 5, 6, 7
Broccoli grows well here as a spring or fall crop — time planting to avoid peak summer heat.
Plant zones
Ontario last frost
Ontario first frost
Days to harvest
When to plant Broccolis in Ontario
Start indoors
Transplant
Harvest
Dates are approximate, based on Ontario's average frost dates. Your exact yard may vary by microclimate.
About Broccoli
Broccoli is a cool-season crop that produces best in spring and fall when temperatures are moderate.
Start indoors 6-8 weeks before last frost for spring planting or direct sow in midsummer for fall. Harvest the main head before it flowers — side shoots continue producing after.
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.
Frequently asked questions
Can you grow Broccoli in Ontario?
Broccoli grows well here as a spring or fall crop — time planting to avoid peak summer heat.
What zone is Ontario?
Ontario spans Canadian Zone 5 (3, 4, 5, 6, 7).
When do you plant Broccolis in Ontario?
Plant Broccolis around mid-April (start indoors Mar 3), harvest Jun 14 – Jul 4.