Toronto, Ontario
When to plant lettuce in Toronto
Station data · 88% confidence cool seasonhalf-hardy to frost
- Direct sowmid AprilApr 11 – May 2 · 88% conf.
- Harvestearly JuneJun 2 – Jun 17 · 79% conf.
- Start seeds indoorsmid AprilApr 11 – May 2 · 84% conf.
- Transplant outdoorsmid AprilApr 18 – May 9 · 88% conf.
The growing window at a glance
Lettuce at a glance in Toronto
- Needs soil above 4°C to germinate well.
- Days to maturity: 45–60 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 can I sow lettuce outdoors in Toronto?
Direct-sow around mid April (Apr 11–May 2) in Toronto, based on its local frost dates. Confidence 88%.
When will lettuce be ready to harvest in Toronto?
Expect to harvest from around early June (Jun 2–Jun 17) in Toronto, based on its local frost dates. Confidence 79%.
When should I start lettuce seeds indoors in Toronto?
Start seeds indoors around mid April (Apr 11–May 2) in Toronto, based on its local frost dates. Confidence 84%.
When can I transplant lettuce outdoors in Toronto?
Transplant outdoors around mid April (Apr 18–May 9) 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 lettuce to maturity outdoors.