Keeping grass on the taller side shades the soil, retains moisture, suppresses weeds, and encourages deeper root growth — all significant benefits for Ontario lawns dealing with summer drought stress.

Seasonal timing:

Spring — growth accelerates quickly; you may need to cut every 5–7 days during peak growth in May and June

Summer — growth slows in heat; cutting every 10–14 days is often sufficient, and raising the mower deck slightly helps protect stressed grass

Fall — growth picks up again in September; maintain regular cuts until the grass stops growing, typically late October in Ontario

Final cut of the year — drop the height slightly for the last 1–2 cuts before winter (around 2.5 inches) to reduce the risk of snow mold, which thrives under long matted grass