The Mowing Habit That Fixes Half the Lawns We Visit

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When we walk a new customer's lawn, the most common problem we find isn't grubs, disease or bad soil. It's mowing height. A lot of lawns in the Linden Valley are cut at 2 inches or lower because short grass looks neat for a day or two. Then the lawn spends the rest of the summer thin, weedy and brown at the edges.

Raising the mower deck is the single cheapest change we know of, and it fixes more lawns than anything we sell.

Why taller grass is healthier grass

Grass blades are the lawn's solar panels. Cut them short and the plant has less leaf to make food with, so it pulls energy from its roots to grow back. Roots get shallower, and shallow roots dry out fast in July.

Taller grass also shades the soil. That keeps the ground cooler, holds moisture longer and, most importantly, keeps sunlight off weed seeds. Crabgrass needs light on bare soil to germinate. A dense lawn cut at 3.5 to 4 inches blocks a surprising amount of it without any herbicide at all.

The heights we use, by grass type

Most Larkhaven lawns are a mix of cool-season grasses. These are the heights our crews set:

Grass	Spring and fall	Summer
Tall fescue	3.5 in	4 in
Kentucky bluegrass	3 in	3.5 in
Perennial ryegrass	3 in	3.5 in
Fine fescue (shade)	3.5 in	4 in

A few neighborhoods, mostly newer builds in Westbrook Heights, have zoysia, a warm-season grass that is cut much lower — about 1.5 to 2 inches. If you're not sure what you have, pull a few blades and look at them next to a photo guide, or just ask us. Our crews note the grass type on every new account.

The last mow of the season, usually in early November, is the one time we drop the deck to about 3 inches. A shorter lawn going into winter is less likely to mat down under leaves and snow.

The one-third rule

Never cut off more than one-third of the blade in a single mowing. If you want to keep tall fescue at 3.5 inches, mow before it reaches about 5 inches.

In May and June, cool-season grass can grow an inch or more a week, so that usually means mowing every five to seven days. That's why our Weekly Care visits are weekly and not every other week. Cutting a 7-inch lawn back to 3.5 inches takes off half the blade, shocks the plant and leaves clumps of clippings that smother the grass underneath.

If you come back from vacation to a lawn that got away from you, bring it down in two or three mowings a few days apart instead of all at once.

Sharp blades matter more than you'd think

Look closely at the tips of your grass a day after mowing. If they're frayed and turning white or tan, your blade is dull. A dull blade tears grass instead of cutting it, and every torn tip is a small wound that loses water and invites disease.

Our crews swap to freshly sharpened blades every day of the season — each mower carries a spare. For a homeowner, sharpening at the start of spring and again around the Fourth of July is plenty.

Leave the clippings

Clippings don't cause thatch. Thatch is mostly made of stems and roots, which break down slowly. Clippings are about 80 percent water and break down within a week or two, returning nitrogen to the soil as they go. Over a season, leaving them on the lawn supplies roughly a quarter of the nitrogen your grass needs.

We mulch clippings back into the lawn on every visit. The exceptions:

• When the grass is wet and long enough to clump. We'll either bag that visit or blow the clumps out so they don't smother the grass.
• When a customer asks us to bag. It's your lawn; we'll do it, and the clippings go to the county yard-waste site, not the trash.
• The first mow of the spring if there's a lot of debris from winter.

Mow when the lawn is dry, and change direction

Wet grass clumps, tears and leaves ruts. When it has rained hard, our crews push a visit back by a few hours or a day rather than leave tracks in your yard, and we'll note it in your visit report.

We also alternate the mowing direction each week. Mowing the same pattern every time pushes the grass over in one direction and wears ruts where the wheels run. Those stripes you see on a well-kept lawn come from the light reflecting off grass bent in different directions — a nice side effect of good practice.

What to try this week

If you mow your own lawn, raise the deck one notch higher than feels right, keep the blade sharp, and leave the clippings. Give it a month. Most of our customers who make this change see a thicker, greener lawn by August, before we've applied a single treatment.

If you'd rather someone else handle it, that's what we're here for. Our Weekly Care plan starts with exactly these habits.