Fall arrives quickly in Minnesota. One week you’re mowing every few days, and seemingly overnight the leaves are changing, mornings are cold and you’re wondering whether it’s finally time to put the mower away.
So, when should you stop mowing your lawn in Minnesota?
The answer isn’t a specific date. You should continue mowing as long as your grass is actively growing. For many Minnesota lawns, that means mowing well into October and sometimes later, depending on temperatures and weather conditions.
Don’t Stop Mowing Just Because It’s Fall
Cool-season grasses commonly found in Minnesota don’t immediately stop growing when summer ends. In fact, cooler fall temperatures can create excellent growing conditions, particularly when there’s adequate moisture.
Growth will gradually slow as temperatures fall and daylight decreases. Instead of mowing according to the calendar, watch the lawn itself. If the grass continues getting taller, keep mowing.
Once you’ve gone roughly two weeks without seeing meaningful new growth and colder temperatures have settled in, you’re probably approaching your final mow of the season.
How Short Should You Cut Grass Before Winter?
It’s tempting to give the lawn an extra-short haircut before winter so you don’t have to worry about it again until spring.
Don’t scalp it.
For most Minnesota lawns, a final mowing height of approximately 2.5 to 3 inches is a good target. You want the grass short enough that it won’t become excessively matted under snow, but long enough to maintain healthy leaf tissue and protect the crown of the plant.
Cutting grass extremely short can stress the lawn just when it needs to store energy for winter and prepare for spring growth.
Why You Don’t Want Grass Too Long Going Into Winter
Leaving the lawn excessively long isn’t ideal either.
Long grass can bend over and become matted beneath snow. That creates a damp environment around the grass blades and can contribute to problems such as snow mold.
The goal isn’t to make your lawn as short as possible. It’s simply to go into winter with a healthy, properly maintained lawn rather than several inches of overgrown grass folded underneath months of snow.
What About All Those Leaves?
Fall mowing also gives you an opportunity to deal with leaves.
A light layer of dry leaves can often be chopped into small pieces with your mower and returned to the lawn. Once finely shredded, those leaves break down much more easily.
A thick layer is another story.
If leaves are covering the grass and blocking sunlight, remove them rather than allowing them to sit on the lawn through winter. Heavy leaf coverage can trap moisture, smother turf and create conditions favorable to lawn disease.
Your final few mowing sessions can be a convenient way to mulch manageable amounts of leaves while keeping the grass at the proper height.
When Is the Last Mow in the Brainerd Lakes Area?
There’s no magic date because every Minnesota fall is different.
In the Brainerd Lakes area, lawn growth typically slows considerably as October progresses. A stretch of colder weather and repeated hard frosts will eventually bring active growth to an end.
That’s why TurfCareMN recommends watching conditions rather than picking a predetermined final mowing weekend.
A warm fall may keep your lawn growing longer than expected. An early cold snap can shut things down much sooner.
Let the lawn tell you when it’s finished.
Should You Mow After a Frost?
A frost doesn’t automatically mean mowing season is over.
Grass can continue growing after a light frost, particularly if daytime temperatures warm back up. However, avoid mowing grass while it’s frozen or covered in frost.
Frozen grass blades are brittle. Walking or driving a mower across them can damage the turf.
Wait until the frost has completely melted and the grass has dried before mowing.
Your Final Mow Is Only Part of Fall Lawn Care
Putting the mower away may feel like the end of lawn season, but what’s happening below ground is still important.
Fall is a valuable time for Minnesota lawns because cool-season grasses are preparing for winter and storing energy for spring. Depending on your lawn’s condition and timing, fall care may include:
- Proper fertilization
- Aeration
- Overseeding thin areas
- Removing excessive leaves and debris
- Addressing weeds
- Making sure the lawn enters winter at the proper height
A little attention in fall can make a noticeable difference when the snow finally disappears.
Don’t Forget About Your Mower
Once you’ve confirmed that the final mow really was the final mow, take a few minutes to prepare your equipment for storage.
Clean accumulated grass from underneath the mower deck, inspect the blade and follow the manufacturer’s recommendations for fuel, batteries and winter storage.
It’s much nicer to deal with mower maintenance in fall than discover a problem on the first beautiful mowing day next spring.
Prepare Your Minnesota Lawn for Winter
The best answer to “When should I stop mowing?” is surprisingly simple: when your lawn stops growing.
Keep mowing as necessary throughout the fall, gradually maintain the lawn at an appropriate height and aim for roughly 2.5 to 3 inches heading into winter. Don’t scalp the grass, but don’t leave it excessively long under the snow either.
If you’re in the Brainerd Lakes area and want help getting your lawn ready for winter, contact TurfCareMN. Professional fall lawn care can help your turf enter the Minnesota winter healthier and give it a better start when spring finally returns.
