How to Aerate Your Lawn

Lawn aeration encourages deep roots, resulting in a healthy lawn. Learn how to give your grass a breath of fresh air with these aerating tips.

Keep in mind: Price and stock could change after publish date, and we may make money from these links.
February 25, 2021
By: Paul Cox
Related To:

If your lawn is showing a bit of wear and tear and water isn't penetrating through the surface, it could be time to aerate your lawn.

Close up of a lawn aerator.

Aerating is the process of scooping or “coring” holes into your lawn so oxygen, water and nutrients can penetrate deeper into the soil.

Photo by: Shutterstock/Alan Kidd

Shutterstock/Alan Kidd

Aerating is the process of scooping or “coring” holes into your lawn so oxygen, water and nutrients can penetrate deeper into the soil.

Backyard soccer games, hundreds of laps run by the family dog, sweltering temps and that way-too-competitive father-son badminton tournament have likely left their mark: thinning grass and soil that feels brick-hard underfoot. Your lawn could use a breath of fresh air — literally.

Aerating is the process of scooping or "coring" holes into your lawn so oxygen, water and nutrients can penetrate deeper into the soil. Aerating also can break up soil that's been compacted and hardened by heavy summer use.

"When you aerate and get oxygen deeper into the soil you are encouraging deeper roots, which in turn will improve a grass's drought tolerance and durability," says Gary Peiffer, an agent with the DeKalb County Extension Office in Georgia.

When to Aerate Your Lawn

It's best to aerate when lawns are actively growing. Depending on your climate, here's the best time of the year to aerate:

Cool-season grass, such as fescue, rye or bluegrass — August through October.

Warm-season grasses, such as Bermuda, zoysia or St. Augustine — Consider aerating in the warmer months of April through June.

Does My Lawn Need Aeration?

Lawns that suffer heavy foot traffic and consist of clay soil get compacted more easily, so they likely need to be aerated more often. Does rainwater run off your lawn without soaking in? Did your lawn turn brown after a few days of hot weather? If so, it might be time to aerate.

Another check: Dig into a square-foot section of your lawn and inspect how deep your grass's roots grow. If they extend less than two inches into the soil, then it's time to aerate.

Before You Aerate

Peiffer says the best aerating machines are those with hollow, metal tines that penetrate the ground and pull plugs of soil from the lawn. You can help the tines penetrate deeper by watering your lawn one to two days prior to areating.

Apply about an inch of water to the grass. Here's how to measure your watering: Place a small tuna can in the middle of your lawn and turn on the water. When the can fills up, you've watered enough.

Mark any sprinkler heads or other lawn obstacles with flags. You'll want to be sure to operate the machine with care around these so the aerator won't gobble them up.

Using the Aerator

The aerator's tines will penetrate the lawn about 2 inches deep, and you'll want to guide the aerator across your lawn in at least two different directions. The plugs pulled from your lawn will break down in a few weeks, depending on the weather (less time if it rains), so you can just leave them on the ground. You can spread compost or a good soil mix to fill in the holes, and you can also choose to spread fertilizer or seed at this time.

plugs pulled by core aeration

The plugs pulled from your lawn by the aerator will break down in a few weeks, depending on the weather (less time if it rains), so you can just leave them on the ground.

Photo by: Ahutterstock/Sherry Barr Photography

Ahutterstock/Sherry Barr Photography

The plugs pulled from your lawn by the aerator will break down in a few weeks, depending on the weather (less time if it rains), so you can just leave them on the ground.

Renting an Aerator

You generally can rent aerating machines from home improvement stores or garden centers for between $60 and $80, depending on how long you'll need the machine. Be sure to factor in time you'll need to spend cleaning up the machine before you return it. They're heavy, so bring some muscle with you when you pick up a rental.

But, operating them isn't much more difficult than mowing your lawn with a self-propelled mower. And in the summer the family dog — not to mention your kids — will appreciate the time you spend now.

Use an Aerator to Revitalize Compacted Lawns 01:04

See how to use a tow-behind aerator.

More Lawn Advice

How to Kill Crabgrass

Get tips for preventing crabgrass from taking hold in your lawn.

How to Lay Sod

Instantly renew your lawn by installing sod. We'll show you how.

Next Up

Grass Guide: Buffalo Grass

Capable of withstanding drought, wind, high heat and more, buffalo grass lives up to its name.

Grass Guide: Bermuda

This hardy turf grass craves hot weather. 

Grass Guide: Fescue

Fescue's adaptability to both cool and warm climates makes it a hit with homeowners. 

Grass Guide: Rye

Rye is a durable, fast-growing grass that loves a mild climate and lots of moisture.

Grass Guide: Kentucky Bluegrass

Give your yard the blues with classic, cool-season grass.

Grass Guide: Zoysia

This heat-tolerant grass shines under even the toughest soil conditions.

5 Reasons Not to Mow Wet Grass

Learn why mowing a wet lawn isn't a good idea, plus get tips on what you should do if you absolutely must cut the grass.

How to Kill Crabgrass

Get tips for getting rid of crabgrass and preventing crabgrass from taking hold in your lawn.

Seeding a Lawn

Fall is the right season to reinvigorate your existing lawn or plant a new one. Follow the steps below to help ensure successful results.

Perennial Grasses

Learn about the different kinds of perennial grasses, including ornamental grasses and perennial ryegrass.

Go Shopping

Spruce up your outdoor space with products handpicked by HGTV editors.

Follow Us Everywhere

Join the party! Don't miss HGTV in your favorite social media feeds.

Related Pages