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Why Is My Yard Lumpy? 5 Common Problems and Solutions
The road to a lump-free lawn doesn’t have to be bumpy
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Get quotes from lawn care providers near you
No obligation · 100% free
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Lumpy grass in your yard often forms when freeze-thaw cycles heave soil upward, creating uneven patches that resemble buckled carpet across your lawn.
Expect to pay $100 to $500 for professional lawn care services that address yard lumps through aeration, fertilization, and other health-focused treatments.
Aerating and reseeding your lawn encourages thicker growth that naturally disguises bumpy areas and helps your yard resist future soil heaving and surface unevenness.
Hiring a local wildlife control professional provides peace of mind when digging animals create extensive burrow systems, helping you address the root cause and restore your lawn.
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There’s nothing quite like looking out on a lush, green lawn on a bright summer day. But if your lawn has lumps and bumps, it might be more of an eyesore than an asset. If you’ve been asking yourself, “Why is my yard lumpy?” this guide will help you determine the most likely cause and the best solution to your lawn woes.
1. Freeze-Thaw Cycles
When the soil in your yard freezes and thaws, it can heave up, causing lumps and uneven patches. The result may be similar to when a carpet buckles and bunches up in your home.
The Solution
Aerate and reseed the lawn to encourage growth in bare or bumpy areas. A well-aerated lawn with healthy growth will better resist the bumps caused by freeze-thaw cycles.
2. Earthworms
Earthworms help enrich the soil to make it healthier, but they can also create casings on the lawn’s surface that leave unsightly lumps and bumps in your yard. The presence of earthworms suggests your soil is fertile and healthy.
The Solution
Earthworms are highly beneficial; removing them from your yard is never recommended. Instead, work on thickening your lawn by overseeding it to encourage thicker grass growth that will disguise the casings.
3. Digging Animals
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Many animals dig holes in your yard, whether searching for food or a safe place to shelter. Voles, moles, and groundhogs can dig extensive burrow systems under your yard, causing lumps to appear. And if your dog loves to dig, you might find several lumpy spots where they’ve dug holes.
The Solution
The best solution to this problem depends on the type of animal digging holes in your yard. Installing motion-sensing lights can deter skunks, while spraying predator urine on burrow entrances could encourage groundhogs to move on. Consider hiring a local wildlife control service to help you stop digging animals from visiting your yard.
4. Heavy Garden Equipment
Overusing heavy garden equipment can cause lumpy ruts or holes in your lawn. If you tend to mow your lawn in the same pattern repeatedly, you may notice grooves or ruts developing.
The Solution
Vary your mowing pattern to prevent ruts from building up, and check that you’re using your gardening equipment correctly.
5. Tree Roots
Juliet Lehair / Moment / Getty Images
The lumps and bumps in your yard could be caused by tree roots growing too close to the surface. Left alone, the roots can grow toward your home’s foundation and cause structural issues.
The Solution
A local tree removal pro can determine the best way to remove tree roots from your yard. You can also cover surface roots by applying topsoil over them—or just remove the grass from that area and mulch it instead to even it out.
When to Call a Pro
Small lumps in your yard can be addressed by aerating the lawn or applying topsoil to even out bumpy areas. Focusing on your lawn’s health can help prevent future lumps from appearing and making your yard look uneven. However, excessively lumpy yards (or infestations of digging animals) are best left to a pro.
A lawn care professional near you can determine why your yard is lumpy and offer suggestions for remedying the problem. They might suggest a lawn care plan to improve the health of your yard, including fertilization, aeration, and dethatching. Lawn care costs between $100 and $500, depending on the services provided
Frequently Asked Questions
Lawn services reviews from real Angi homeowners in Columbus, OH
4.6★ avg. • 56 total reviews
- Kristen A.
They show up and they did take us on as a client which seems to be a problem with other lawn care providers. We have multiple properties and this one was located close to downtown and no one really wants to mess with it.
- Terri O.
The worker came out when he was supposed to come. He informed me he would honor the Angie's List deal, but would not do any more work for me since my son in law owns lawn care company as well, even though they do not do the same type of work. He said he did not feel comfortable giving me...
Bello Giardino LLC - Amy H.
E & L Lawn Care was super. They were very responsive before and after service. They were efficient and were able to complete the job within 1 day. I have had concern about one section of sod - the owner was pro-active and did a visit to evaluate. I have no doubt they will stand behind...
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