Every spring, the same thing happens across Genesee County. A warm week hits in late March, everyone thinks about their lawn for a day, and then it rains for two weeks. By the time the mowers come out, the grass is six inches tall and half of it gets scalped on the first pass.
The first cut of the year matters more than most people realize. It sets up how the turf handles the rest of the season, and getting it wrong in April shows up as thin, weedy grass in July.
Go by soil temperature, not the calendar
Cool-season grasses — which is nearly everything grown in Michigan — start actively growing when soil temperature holds steady around 50°F. In Genesee County that usually lands somewhere in early-to-mid April, but it swings by two or three weeks year to year.
The practical version: don't watch the date, watch the grass. When it's actively growing and has reached about three and a half inches, it's time. That's usually a week or two earlier than most people get to it.
Never cut more than a third
This is the rule that gets broken most often, and it's the one that does the most damage. Removing more than a third of the blade height in a single cut shocks the plant. It dumps its energy into regrowing leaf tissue instead of building roots, and a lawn with shallow roots is a lawn that browns out the first week of August.
If your grass got away from you and it's five inches tall, don't drop straight to three. Take it to four, wait three or four days, then take it to three and a half. Two passes and a short wait costs you nothing and saves the turf.
Set your mower higher than you think
For Michigan cool-season turf, three to three and a half inches is the range. Most homeowners cut closer to two, because a short lawn looks tidy the day it's cut.
Taller grass shades the soil, which keeps it cooler and holds moisture through dry spells. It also grows deeper roots, and it physically blocks light from reaching crabgrass seed sitting at the soil surface. Cutting high is the cheapest weed control there is.
Sharpen the blade first
A dull blade tears the grass instead of slicing it. Look closely at the tips a day after mowing — if they're frayed and going tan, that's a dull blade. Those ragged wounds lose more water and give disease an opening.
Sharpen at the start of the season and again around mid-summer. It's a fifteen-minute job that visibly changes how the lawn looks two days after every cut.
Don't mow wet ground
Michigan springs are wet, and it's tempting to mow on the first dry-ish afternoon. Resist it. Wet grass clumps and cuts unevenly, wet clippings mat down and smother what's underneath, and a mower on saturated soil leaves ruts that take the rest of the season to recover.
This is one of the reasons we build weather flex into our schedules rather than forcing a route through. A day's delay costs nothing. Ruts across a front lawn last for months.
A simple spring sequence
- Clear winter debris and matted leaves before the first cut — anything smothering the turf has to come off.
- Sharpen the mower blade.
- Set cut height to about three and a half inches for the first pass.
- Make the first cut when the grass is actively growing, not on a calendar date.
- Apply a pre-emergent before soil temps hit the mid-50s if crabgrass has been a problem.
- Settle into a weekly rotation once growth takes off in May.
None of this is complicated. It's just easy to get slightly wrong in ways that compound. If you'd rather it just get handled on a schedule that holds, that's what we're here for.
All lawn care tips