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How to cut your lawn to the best height

How to cut your lawn to the best height
(Image credit: Getty)

If you’re wondering what the best height to cut your lawn is you’re in the right place. Whether you have one of the best gas lawn mowers, electric lawn mowers, or you have a bigger backyard that needs a rider lawn mower, cutting your grass to the right height is important for the overall health of your lawn. 

Here we have the exact heights to cut your lawn in the cold and warmer seasons, and some advice on how to create a healthier lawn. And it’s not as simple as one rule for all either, as many different US states have different conditions and climates, we’ve got the optimal height and variety of grass for where you live. 

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It’s no secret that most of us head outside to cut our lawns once a week or thereabouts in the summer months, purely because the grass is looking a little too long, and giving it a cut makes gives your backyard an instant makeover. 

However, cutting your grass too short can damage it and encourage more weeds to grow, whereas letting it grow too long is a perfect playground for slugs and other pests. 

To find an ideal solution, experts and lawn mower manufacturers, Troy-Bilt, shared its tips for cutting your grass perfectly over at

‘Identifying your plant hardiness zone is the first step in maintaining the ideal mowing height for the health of your lawn, as you can better understand your growing environment and what thrives best in your location.’

For more lawn care ideas, check out our advice on how to create lawn stripes.

What length should you cut your grass?  

Cool-season grass 

Troy-Bilt explains that states in the northern region of the US will most likely have cool-season grass. These grasses are much better at dealing with changing temperatures and see the biggest growth in the spring and fall seasons. 

You should cut your cool-season grass at a height of between 2 and 3 inches. Troy-Bilt explains that for ryegrass, 2 inches is the optimum height. The experts add ‘because of its fast growth and shallow root systems, ryegrass should be mowed often but shouldn’t exceed 2 inches’. For Kentucky Bluegrass, 2.5 inches is an ideal height, and Fescue grass can be cut at 3 inches. 

(Image credit: Getty)

Warm-season grass

Typically, as the name suggests, you’ll find warm-season grasses in the more southern regions of the US. Warm-season grasses do most of their growing in the summer months and then tend to lie dormant when it’s cooler. 

Troy-Bilt recommends an average lawn length of 2 inches for warm-season grasses. Examples of this type of grass include Bermuda and Zoysia, which should be cut at 2 inches high, whereas St. Augustine grass, which typically grows near the coast, should only be cut ‘after exceeding 3 inches in height’.

As a general rule, whichever type of grass you have, it’s best to avoid cutting it any shorter than 2 inches.