When is it safe to plant cherry tomato seedlings in the ground in Toronto?
Tomatoes like hot weather and full sun; even a very light frost will damage them. The traditional rule of thumb for planting warm season vegetables is the May long weekend. Various sources give earlier dates for the last spring frost in Toronto – somewhere between May 4 and May 9. These dates are historical averages and there may be frost later than this in any particular year. We’re only a week away now from the May long weekend and a glance at the Weather Network for conditions between now and then show warm temperatures even at night. I would say you can plant cherry tomatoes any time now.