Ontario’s growing window opens later than most gardeners plan for, and it can close early if a hot stretch settles in.

September in Ontario still belongs to the growing season more than to the shutdown.

October in Ontario means garlic and shallots go in the ground, spring bulbs get their last window before the soil locks up, and cover crops can still be…

By November, most of Ontario has already passed its average first fall frost, so new outdoor plantings of anything tender are done for the season.

May is the month Ontario gardens shift from cautious to full throttle. The province’s average last spring frost lands April 30, which means most of May…

March in Ontario sits well ahead of the average last spring frost, so the open garden stays mostly closed this month.

By June, Ontario gardeners are past the guessing game. The average last spring frost at the Toronto area’s Pearson station sits at April 30, so a full…

July in Ontario runs squarely through the frost-free stretch: the average last spring frost falls April 30 and the average first fall frost isn’t until…

January in Ontario means frozen ground, short daylight, and a growing season that is still three to four months away.

February in Ontario sits close to the coldest point of the year, roughly three months before the province’s average last frost.