Clumps of Grass in Lawn: Why and How to Fix Them

Published Categorized as Lawn Grass

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When managed well, your property appears gorgeous and full of healthy turf with deep green color. However, sometimes the grass can grow in clumps, which is disheartening, considering your spending on that lawn. But what causes clumps of grass in lawn, and how can you fix clumpy grass in lawn? Keep reading to find out.

You have clumps of grass in your lawn because of too much moisture on your grass, the type of soil, over-watering, and the presence of weeds. The type of soil in your yard and the grass variety you’re growing may also contribute to clumpy grass. To fix them, control weeds consistently, mow dry grass, aerate your soil, and water your lawn properly.

Why Is My Grass Growing In Clumps?

Clumps of Grass in Lawn

No one wants grass clumps in lawn. But at times, try as you may, your grass may have grass that grows in clumps. These are some of the reasons why your grass doesn’t come out greener, thicker, and fuller as you want:

1. Mowing wet grass

If you see the grass in your lawn growing holding too close to each other soon after mowing, the problem is your mowing timing. Cutting wet grass results in clumpy growing grass. Therefore, avoid mowing the lawn after rainstorms or soon after watering.

2. Over-watering

Watering grass is vital for achieving a healthy lawn. However, applying too much water on your turf can absorb results in grass growing in clumps.

3. Presence of weeds

Are the clumps of grass in lawn growing in patches? Those might not be the turf at all! It might be crabgrass or other grassy weeds.

4. Type of soil

Your grass grows healthy or unhealthy depending on soil conditions. If your garden has sandy soil, you’re more likely to have grass clumps in your lawn than with loamy soil.

5. Grass type

Various types of grass grow in clumps. They include Orchardgrass, Rough Bluegrass, Bentgrass, Bermuda, Zoysia, and Kentucky 31 Tall Fescue.

How to Fix Grass Growing in Clumps

Basically, the fastest and most affordable way to deal with clumps of grass in lawn is to disperse them using a blower (pictured below) or a fan rake.

i. Control weeds consistently

Keep your lawn weed-free by performing weed control practices like pulling out these undesired plants or using herbicides to control them.

ii. Mow dry grass

The best way to prevent turfgrass from growing in clumps is to mow your lawn only when the turf is dry. Avoid mowing early in the morning, after watering, or after rainstorms.

iii. Aerate your soil

Aeration allows nutrients, air, and water to circulate freely through your lawn, making your soil healthy. This helps the turf develop a stronger root system, making it grow healthier and thicker than in compacted soil.

When it comes to finding the best aerator to solve your grass that grows in clumps, that shouldn’t be a problem. Amazon has some of the best, and my recommendation is Agri-Fab 45-0299 48-Inch Tow Plug Aerator (pictured below).

iv. Water properly

Grass requires 1″ to 1 ½ ″ of water weekly to grow healthy. Therefore, avoid giving your lawn more than this, as it can cause grass clumping.

Frequently Asked Questions (FAQs)

Q: How do I get rid of grass clumps in lawn?

A: The best way to disperse clumpy grass in lawn is by using a blower or a fan rake. If the clumps are too much, rake them together and dispose of them using a lawn waste bag. Leaving these clumps in the yard for too long can suffocate the grass and turn it brown or yellow.

Q: What causes grass clumping?

A: Grass grows in clumps due to two main factors: soil conditions and moisture. If you over-water your lawn, the water will be more than the soil can handle, causing grass clumping.

Q: Why am I getting clumps of grass after mowing?

A: The main reason for grass growing in clumps after mowing is you are using a heavy lawn mower, which when cutting grass, puts weight on the ground and starts to sink. In due time, grass grows in clumps in matted wet wads, which clog the mower’s deck and catcher compartments.


Every homeowner takes great pride in growing a healthy, beautiful lawn. Thus, when something interrupts your well-maintained property, the best thing is to identify and amend the issue.

If you have clumps of grass in lawn, the reasons might be mowing wet grass, over-watering, and the presence of weeds.

Additionally, your grass might grow in clumps due to the type of soil and the grass type in your lawn. To fix these clumps, control weeds consistently, mow dry grass, aerate your ground, and water your lawn correctly.

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By Wycliffe Magara

Hi, my name’s Wycliffe Magara, a professional landscaper, journalist, published author, photographer, and lawn attendant. Apart from this site, I also own LawnAffection, Grasstology, and TheScholarshipTipster. I specialize in creating informational content to help you grow a Lifelong Lush Lawn and find the ideal scholarship opportunities no one ever talks about.