Gardening in Ontario

Everything we have worked out for Ontario: what to plant and when, which varieties finish in time, the pests that actually turn up here, and the jobs that pay off month by month. We also cover the rest of the property, from lawns and soil to home care and energy, because a garden rarely stops at the vegetable bed.

The numbers first, because everything else follows from them. Measured at the weather station in Toronto, the last spring freeze falls around April 30 and the first fall freeze falls around October 16, 2,297 growing degree days in the year.

That is enough for early varieties, tight for anything late. Garlic does well: 30.4 weeks below 40 °F, comfortably past the six it needs to form a proper head.

Elsewhere on the property in Ontario: the pests that turn up here.

Figures from Environment and Climate Change Canada. A state is not one climate: elevation, a large lake or the coast can move these dates by two weeks either way, so check your own county with the extension service before you spend money.

When to Sow Beets in Ontario

When to Sow Beets in Ontario

In most of southern Ontario, that means sowing beets two to three weeks ahead of the average last spring frost of April 30, so roughly mid-to-late April…

Will Sweet Corn Ripen in Ontario?

Will Sweet Corn Ripen in Ontario?

Yes, sweet corn ripens reliably in Ontario, but not on the same calendar most gardeners assume. The corn clock doesn’t start at the last frost.

When to Sow Sweet Corn in Ontario

When to Sow Sweet Corn in Ontario

Sweet corn in Ontario goes into the ground only once the soil itself, not the calendar, holds steady above 60°F, a threshold that lands well after the…