For this reason, some people prefer to mow at 3 or 3.5 inches. For the healthiest and most sustainable approach, Michigan State University Extension says 3.5 to 4 inches is most desirable. Lawns mowed at 3.5 or 4 inches out-compete weeds, tolerate grubs and look just as good as lawns mowed at 2.5 inches.
Studies have shown that increased mowing height alone reduces weed pressure significantly, even in the absence of pre-emergent herbicides.
Cut cool-season grasses to 3 or 3 ½ inches. Mow warm-season grasses to 2 or 2 ½ inches. In summer, grass can be kept a bit higher to prevent weeds, help shade the soil line, and maintain water in the soil.
Reasons to Avoid Cutting Grass Too Short
A larger surface area is needed for photosynthesis to occur. Limiting the amount of sunlight and air that your grass is exposed to can inhibit successful development and weaken the plant's roots. This can in turn leave your lawn vulnerable to invading weeds, diseases and pests.
The ideal length of your lawn depends on your climate, but most experts agree you should keep your grass between 2 1/2 inches to three inches long, with the last cut of the season remaining the same.
For this reason, some people prefer to mow at 3 or 3.5 inches. For the healthiest and most sustainable approach, Michigan State University Extension says 3.5 to 4 inches is most desirable. Lawns mowed at 3.5 or 4 inches out-compete weeds, tolerate grubs and look just as good as lawns mowed at 2.5 inches.
Cut your lawn to possibly the shortest height you have all season. The ideal height is around 2 1/2 inches. Cut it too low and the grass might not be long enough to photosynthesize and provide nutrients to the roots. Too high and the frost might become matted after a snowfall.
Mowing every two weeks — instead of weekly — and not dousing grass with chemical herbicides and fertilizers, helps the environment and supports the health of bees, which are among the world's most important pollinators.
Longer grass reduces the amount of weeds.
The extra shade given off by long blades of grass helps prevent light from reaching weeds and crabgrass. Without light, the unwanted weeds can't germinate, and you won't have to put up with them taking root in your beautiful lawn.
A mowing height between 2.5 to 3 inches is best for most of the season, except during summer stresses when the lawn mowing height should be raised one-half inch to mow at 3 to 3.5 inches. Raising the mowing height provides more insulation from summer heat and reduces water loss from your soil.
Mowing actually helps make your grass grow thicker because the tip of each blade contains hormones that suppress horizontal growth. When you cut the lawn, you remove these tips allowing the grass to spread and grow thicker near the roots.
For a typical residential Midwest lawn, maintain a height of 3 inches or higher. Taller grass shades out weed seeds and keeps soil cooler.
A shorter spring cut rids your lawn of any winter-burned strands and preps it for a fresh growing season. Mow cool season grasses to a height of 3+ inches, and cut warm season grasses as low as half an inch and up to 1.5 inches.
If you already have signs of crabgrass growing in your lawn it is important to take care when mowing. Crabgrass stalks contain hundreds of seeds, these can spread every time you mow or rake the lawn making the problem worse.
By simply cutting off the top of the weeds, you're merely forcing them to grow again. To really address the problem, you need to yank or dig them out by their roots. It's a long, arduous process, especially if you have a yard full of weeds, but it's the only way to prevent them from growing back at full force.
Zoysia is ideal because it actually grows differently. It sends out runners or "stolons," expanding sideways more than it grows tall. This is why it is so dense and effective at choking out most summer weeds and replacing existing grass.
If the grass is too wet, you shouldn't mow and if it's too dry you shouldn't either. Remember, mowing is a stressful event for your lawn. If you mow when it's already under stress, such as during dry spell or drought, then it will become even more stressed. You don't like to be stressed and neither does your poor lawn.
No Mow May was first popularized by Plantlife, an organization based in the United Kingdom, but is now gaining traction across North America. The goal of No Mow May is to pause mowing during the month of May, allowing flowers to bloom in your lawn to help early season pollinators.
The rate of grass growth and desired height of your lawn determine how often you need to mow. Typically, mowing once a week during the growing season should suffice to keep your lawn healthy. The rest of the time, you can reduce the frequency of cutting to every other week, as necessary.
Is mowing before or after rain better? It is always better to mow before rain if possible. If your grass is dry, but you see rain on the way, it is a good idea to mow the yard before the rain arrives. Otherwise, the next best time to mow is when your grass has completely dried after rainfall.
Allow all grasses to grow taller in summer and during drought. Mow warm-season turf shorter in spring to remove dead grass blades. Mow cool-season grasses shorter for the final fall mowing in snow prone regions to help prevent snow mold. Allow grasses growing in shade to grow taller.
The mowing height range for most grasses is between 1.5 and 3 inches. In general, for most lawns 2 to 2.5 inches is optimum because if you are mowing at 3 inches, your lawn may grow to 5 or 6 inches before you mow it again. Here are some problems associated with letting your grass grow too long: Lawn thinning.
It starts growing leaves faster so that it can replace the leaf you cut off or make up for being in the shade. This means the closer you mow the faster the grass grows! The grass plants future survival depends on it manufacturing food, which it can't do without an adequate amount of leaf.
Circular Mowing Pattern
After mowing in stripes or rows, the next most efficient way to mow your lawn is in concentric circles. Depending on the shape of your lawn, this may actually be more efficient. Concentric circles use the same time-saving technique as mowing in stripes: it's all about the turns.