Keep mowing as long as the grass keeps growing, at your usual height. In New England that is often well into late October or early November. The aim is a lawn that goes into winter at about three inches: not long enough to mat under snow, and not scalped.
UMass Extension’s turf guidance is to keep mowing into the fall until the grass stops growing, at the same 2½ to 3½ inch height used through the season. There is no fixed last date: a mild fall stretches the season, and an early cold snap ends it.
Choate mows weekly through the growing season and keeps the same cutting height through the last visits of the year. This guide covers what to watch for if you mow your own lawn, and what to ask if you hand it off.
How to tell the mowing season is over.
Most Massachusetts lawns are cool-season grasses, which grow best at air temperatures of about 65 to 75°F; outside that range, growth slows or stops (UMass Extension). UNH Extension notes that growth slows most of all once the soil drops below about 40°F, and UVM Extension finds lawns still growing well into late October or early November.
- A week’s growth is barely worth cutting. When a mow takes almost nothing off, the season is winding down.
- Frosty mornings are routine. Cold nights slow the grass further; let the frost melt before you mow.
- Leaves outpace the grass. In many yards the last visits are more about leaves than mowing.
What height should the last mow be?
Your usual one. UMass Extension recommends 2½ to 3½ inches for home lawns and says to keep mowing until growth stops; its snow mold fact sheet gives the same advice, so the lawn does not go into winter with a tall canopy. UNH Extension recommends 2½ to 3 inches until the grass stops growing in late fall.
Some extension services suggest dropping the final cut a little, and others leave the height alone. They agree on the two things to avoid:
| Going into winter | What it means |
|---|---|
| Longer than about 3 inches | Grass left long at the end of the season can mat under the snow (UNH Extension), and a tall canopy favors snow mold (UMass). If it is still growing, mow again. |
| About 2½ to 3½ inches | The range UMass recommends for home lawns all season. There is no need to change it for winter. |
| Scalped short | UMass treats scalping, mowing excessively low, as a problem to avoid. Even for a final cut, UNH Extension would not go below about two to two and a half inches. |
Choate keeps its regular height through the last visits, which keeps a lawn in the middle row.
Fall mowing habits that help.
- Take off no more than a third. UMass advises removing no more than one third of the grass blade at a time. If the lawn got ahead of you, bring it down over two cuts.
- Deal with leaves before they mat. A light covering can be mowed into the lawn (UMass); a thick layer is easier to rake or collect, and leaves left through winter can smother grass and promote snow mold (UNH Extension). Our fall leaf guide helps you decide.
- Stay off frosted grass. Wait for frost to melt before mowing or walking on the lawn; UConn Extension advises against walking on frozen grass, especially without snow cover.
- Keep the blade sharp. UMass advises keeping mower blades as sharp as possible.
Putting the mower away for winter.
UMass Extension recommends winterizing push and riding mowers: add a stabilizer to ethanol gas so the fuel does not absorb water, then run the engine for five to ten minutes. Check your mower’s manual for anything specific to your model.
Hand off the last mows and the leaves.
Late fall is when mowing and leaf cleanup overlap. Choate’s weekly mowing runs through the growing season, and fall cleanups follow the leaf drop in stages, with hauling included when it is agreed in your estimate. Both can be part of a year-round care plan with one monthly price.
Getting the rest of the yard ready? See the fall-to-winter yard checklist.
Sources
- Mowing, Best Management Practices for Lawn and Landscape Turf, UMass Extension Turf Program
- The Snow Molds, UMass Extension Turf Program
- Best Management Practices for Lawn and Landscape Turf (PDF), UMass Extension
- Garden Clippings, 2019 Vol. 38:8, UMass Extension
- November Gardening Tips, UNH Extension
- Fall Gardening for Rewards Next Year: Bulbs, Garlic and Lawns, UNH Extension
- Is It Absolutely Necessary to Rake the Leaves in the Fall?, UNH Extension
- Lawn Management in the Fall (PDF), UVM Extension
- January news, UConn Home & Garden Education Center