Summer Mowing Tips: How High and How Often in Hot Weather

Mowing your lawn in the summer isn't the same as mowing it in spring. Hot, dry Kitchener-Waterloo summers put real stress on grass, and the way you mow can either help your lawn thrive or push it over the edge. A few simple adjustments make all the difference. Here's how to mow the right way when the heat is on.

Raise Your Mowing Height

The single most important summer mowing change is to cut your grass higher. In the heat, set your mower to leave the grass around 3.5 to 4 inches tall — a bit taller than you'd cut in spring.

Taller grass shades the soil, keeping it cooler and locking in moisture so your lawn doesn't dry out as fast. Longer blades also grow deeper roots, which help the grass find water during dry spells. As a bonus, taller grass naturally shades out weed seeds before they can sprout.

Mow Less Often in the Heat

Grass grows more slowly during hot, dry weather, so you simply don't need to mow as often. Where you might cut weekly in the cooler, rainy weeks of early summer, you can often stretch to every 10 to 14 days during a heatwave.

The best rule is to watch the grass, not the calendar. Mow when it needs it, and ease off when growth slows. Cutting a stressed lawn on a strict weekly schedule only adds to the strain.

Follow the One-Third Rule

No matter the season, never remove more than one-third of the grass blade in a single cut. In summer, this is especially important — taking off too much at once shocks the grass, exposes the soil, and can scorch your lawn in the heat.

If your lawn has gotten long, bring it down gradually over a couple of mows rather than all at once.

Keep Your Blade Sharp

A dull mower blade tears the grass instead of slicing it cleanly, leaving ragged, frayed tips that turn brown and lose moisture quickly — exactly what you don't want in summer. A sharp blade gives a clean cut that heals faster and keeps your lawn looking healthy. Sharpen it at least once or twice a season.

Mow in the Cool of the Day

Avoid mowing in the blazing midday heat. Cutting in the early morning or evening is gentler on the grass and far more comfortable for you. Mowing during the hottest part of the day stresses an already-thirsty lawn and slows its recovery.

Also wait until the grass is dry — mowing wet grass leads to uneven cuts, clumping, and clogged mowers.

Leave the Clippings

Don't bag your clippings in summer. Known as grasscycling, leaving the cut grass on the lawn returns free, natural nutrients and moisture straight back to the soil as it breaks down. It feeds your lawn naturally, helps it stay hydrated, and reduces the need for fertilizer — a win for an all-natural lawn.

Go Easy on a Dormant Lawn

If your lawn has turned brown and gone dormant during a drought, mow it as little as possible. Dormant grass isn't growing, so it doesn't need cutting, and walking or mowing over it repeatedly can damage the crowns. Wait for it to green back up before resuming your normal routine.

A Few Small Changes, a Healthier Lawn

Mowing high, mowing less often, keeping a sharp blade, and leaving your clippings — these small summer adjustments protect your lawn through the toughest months and keep it green, thick, and resilient.

Too hot to deal with it yourself? KW Lawn Mowing provides reliable, all-natural lawn mowing across Kitchener, Waterloo, and the surrounding area, with the right technique every time. Get in touch today to set up your summer mowing schedule.