Mowing is one of the most important aspects of a good lawn. It makes the lawn attractive and dense, and helps prevent weeds. Proper mowing is also critical for maintaining quality turfgrass, no matter what the season.
Mow often enough so that no more than one third of the grass is removed at one time. On average, that’s about once a week. However, cool season grasses grow most rapidly at temperatures between 60 and 75 degrees Fahrenheit, so those lawns may need mowing twice a week in the spring.
How high you mow depends on the kind of grass and the season of the year. Bluegrass, fescue and ryegrass will endure summer heat stress better if they are left slightly taller during that time (3 – 31/2”). This height is also recommended for shade grasses, so there will be more leaf surface to capture the limited light.
Keep your lawnmower blades sharpened for a good cut. In addition, sharp blades cut faster and require less power and gas. The mowing pattern is less critical than the height of the cut or mowing frequency, but it can contribute to thick, healthy turf. Cut the lawn in a different direction each week to prevent the compaction of having the mower wheels pass in the same pattern each time you mow. This also distributes the traffic and wear pattern more evenly and improves the quality of cut because the grass won’t lean in one direction.
It is best not to mow wet grass, as that increases the probability of soil compaction and the chance of spreading disease-causing organisms.
Removing turf clippings makes for a more attractive lawn, but research shows minimal adverse effects from leaving them on the lawn.