Toronto, Ontario
When to plant radish in Toronto
Station data · 88% confidence cool seasonhardy to frost
- Direct sowmid AprilApr 11 – May 2 · 88% conf.
- Harvestearly MayMay 6 – May 11 · 79% conf.
The growing window at a glance
Frost-free growing season · 150 daysFrost risk (before May 9 / after Oct 6)
Radish at a glance in Toronto
- Needs soil above 5°C to germinate well.
- Days to maturity: 25–30 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 radish outdoors in Toronto?
Direct-sow around mid April (Apr 11–May 2) in Toronto, based on its local frost dates. Confidence 88%.
When will radish be ready to harvest in Toronto?
Expect to harvest from around early May (May 6–May 11) in Toronto, based on its local frost dates. Confidence 79%.
How long is the growing season in Toronto?
Toronto has roughly 150 frost-free days, which is enough time to grow radish to maturity outdoors.