Toronto, Ontario
When to plant leek in Toronto
Station data · 88% confidence cool seasonhardy to frost
- Harvestearly AugustAug 3 – Aug 23 · 79% conf.
- Start seeds indoorslate FebruaryFeb 28 – Mar 21 · 84% conf.
- Transplant outdoorslate AprilApr 25 – May 16 · 88% conf.
The growing window at a glance
Frost-free growing season · 150 daysFrost risk (before May 9 / after Oct 6)
Leek at a glance in Toronto
- Needs soil above 7°C to germinate well.
- Days to maturity: 100–120 days.
- Climate zone: Continental, warm summer (Dfb).
Frost dates are probabilities, not guarantees. Your garden's microclimate — slopes, walls, urban heat, cold pockets — can shift these dates by a week or more. Use them as a confident starting point, then watch your local forecast.
Frequently asked
When will leek be ready to harvest in Toronto?
Expect to harvest from around early August (Aug 3–Aug 23) in Toronto, based on its local frost dates. Confidence 79%.
When should I start leek seeds indoors in Toronto?
Start seeds indoors around late February (Feb 28–Mar 21) in Toronto, based on its local frost dates. Confidence 84%.
When can I transplant leek outdoors in Toronto?
Transplant outdoors around late April (Apr 25–May 16) in Toronto, based on its local frost dates. Confidence 88%.
How long is the growing season in Toronto?
Toronto has roughly 150 frost-free days, which is enough time to grow leek to maturity outdoors.