The first frost date across Ontario ranges from late September in cottage country to early November along parts of Lake Ontario, shaping how long gardeners …
Tag: first frost date
A region’s first frost date marks the average calendar window when sub-zero overnight temperatures arrive to end the warm-weather growing season. Pinpointing this transition allows growers, landscapers, and homeowners to plan late-season harvests, protect tender plants from ice damage, and complete fall property winterization on schedule.