What Length Should You Cut Grass in the Summer?

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Maintaining a visually appealing lawn throughout the summer months demands a combination of knowledge and strategy. Understanding the intricacies of grass length during this pivotal season can significantly impact your lawn’s overall health and appearance. 

As someone deeply immersed in the world of lawn care, I’m here to guide you through the essential tricks and tips that will keep your grass in its prime condition. Keep reading!

Condition and Growth of Grass in the Summer Months

Warm-season grass growth is slow at temperatures of 59°F (15°C) or lower. Below 44°F (7°C), cool-season grasses grow slowly, and some may still grow at the freezing point. 

Each species and variety within a species will have its ideal temperature, moisture, sunlight hours, and soil characteristics.

measuring grass height

During the summer, high temperatures and low precipitation can reduce grass growth and induce dormancy. However, when temperatures drop and fall arrives, growth resumes, and moisture becomes more abundant.

Grass Types and Mowing Height

Various grass types exhibit unique requirements, demanding tailored care for optimal growth. When it comes to mowing, it’s essential to cater to the specific needs of your grass variety to ensure a healthy and vibrant lawn. 

To assist you in this endeavor, below is the comprehensive list of grass types, along with their respective ideal mowing heights:

Cool Season Grasses

If you live in the Northeast, Midwest, or Pacific Northwest of the United States, your grass is in this category. Colder climates are home to cool-season grasses and have varying ideal heights, which are:

Kentucky bluegrass

Warm Season Grasses

Warm-season grasses are the norm in the warmer southern and southwestern parts of the United States. Here are warm-season grasses and their respective ideal heights:

The Rule of Thumb in Mowing Grass

The general rule of thumb for determining the grass height on your lawn for cool-season grass is approximately 2 1/2 inches. You should only remove about the top third of the grass blade at each mowing. Thus, the best time to mow your lawn is when it is about 3 2/3 inches tall.

How Short Should I Cut My Grass in the Summer?

While the 2 1/2-inch height for cool-season grass is ideal for the fall, you should not follow this throughout the mowing season.

lawn mower

During the spring and summer months, keep your lawn grass at least 3 inches tall in order to keep crabgrass [1] at bay. The tender crabgrass will be killed by frost by the time you get back to the 2-1/2-inch height in the fall.

Additional Tips and Tricks


The amount of water your lawn needs depends on the weather, soil drainage, and the amount of sun or shade in your landscape. A good rule of thumb is to give your lawn one inch of water per week during the summer. 

To determine how much water you need to supplement any rainfall, use a rain gauge or a container.

Identify and Treat

Dollar spot is a common type of summer lawn disease that can affect many different types of grass. 

Patch disease is another common summer lawn disease, but the infection is not visible until the plants are stressed, so preventive treatment as part of your lawn care program is essential.

a dog lying on the grass

Control Weeds

Weed control is an essential part of a summer lawn care program. Weed control begins with an inspection of your turf to detect unwanted growth early on.  

Your lawn specialist will create a program that considers your personal preferences while also incorporating carefully targeted treatments for weeds like crabgrass and other issues in your lawn.

See Also: Fall Lawn Care Routine 

Remember the measurements

Make things simple and easy by drawing a line across one of your lawnmower tires that is 3 2/3 inches above surface level. Draw an arrow pointing up or down to indicate which way is up or down. When it’s time to mow, just check the grass level with the line you drew on the tire.


Should you cut your grass during a heatwave?

You should not cut your grass during a heatwave because it stresses it even more. Grass can only tolerate a heatwave if it’s in a healthy state. Weeds enjoy hot weather and will thrive, so continue to hand-pull weeds during the heatwave, but take extra precautions.


As summer graces us with its warmth and sunshine, it marks the perfect time to savor the fruits of your labor in cultivating a pristine lawn. Your journey to maintaining a truly impeccable lawn doesn’t pause with the arrival of this cherished season. The secret to a consistently vibrant and healthy lawn lies in year-round commitment and dedication.

So remember what length to cut your grass in the summer and follow my summer lawn care tips to avoid problems that could harm your lawn and landscape this summer.

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Robert Johnson is a passionate furniture maker & carpenter, sought after for his knowledge on the craft.
You’ve probably seen his down-to-earth wisdom in USA Today, Bobvila, Family Handyman, and The Spruce, where he has shared commentary and guidance on various woodworking topics.

Robert is the brain behind Sawinery, where he aims to share tips, tricks, and a passion for all things carpentry.

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