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NaturaLawn® of America, Inc. The Leader In Organic-Based Lawn Care®

A Homeowners Guide to Core Aeration & Overseeding Benefits

Original Publication Date: September 10, 2018

The saying that the grass is always greener on the other side is often quoted, but when talking about your own lawn, your grass’s color is the only one that matters. Maintaining a thick, healthy lawn, filled with uniformly-cut grass, does take a lot of work. However, the results are certainly worth the effort.

Achieving a lush lawn involves more than just regular watering and mowing. Grass, like any living thing, needs the right nutrients to grow and stay healthy. That's where the techniques of core aeration and overseeding come in. However, it's essential to perform these lawn maintenance tasks at the right time to get the best results. As your grass adapts to the climate changes that occur throughout the year, the timing of this process will determine how strongly your lawn is affected by aeration and overseeding’s benefits.

Understanding Core Aeration and Overseeding

What Does it Mean to “Aerate” A Lawn?

Aerating a lawn means allowing air and water to circulate more effectively through it. Aeration is crucial to delivering oxygen, water, and nutrients to the grassroots, helping the grass stay healthy and grow well. The basic idea of aeration is to make holes in the turf, allowing rain or water from sprinklers to penetrate the soil more efficiently.

However, not all lawns need aeration. Nature usually provides a balance, but sometimes human activities can lead to a lawn losing essential nutrients. In these situations, aeration can be critical for maintaining a lawn's health or even its survival.

You might need to consider aerating your lawn if the lawn gets a lot of use, from children, animals, or wildlife. Dry climates and droughts can also make aeration more important, as the relative lack of moisture means that a failure to let water flow through the lawn freely leads to dead grass in places that the water simply can’t reach.

It’s also generally a good idea to aerate just after moving into a new place, to set it up for success, as the topsoil may have been slightly neglected during the real estate process.

Do I Have to Aerate My Lawn?

Mother Nature knows what she’s doing, so no, not all lawns need to be aerated. More accurately, not all lawns need to be aerated all the time. People often create situations that can rob a lawn of its vital nutrients. It’s in these cases that aeration can become vital to a lawn’s health or even its mere survival. If you’re not sure whether your lawn needs core aeration and overseeding, contact your local NaturaLawn and one of our lawn service specialists can help you decide.

What is the Best Time to Aerate a Lawn?

As we talked about, not all lawns will always require aeration. However, if you’ve decided that your lawn needs it, the next question is when to go through with the process. You need to carefully coordinate the aeration process with the grass's growth cycle for optimal results. Here's how to determine the best timing based on the type of grass in your lawn:

  • Cool-Season Grass (Kentucy Bluegrass, Perennial Ryegrass, Fine & Tall Fescue): This type of grass thrives in the northern parts of the United States and has a growth cycle that peaks during the cooler months of the year. It tends to green up early in the spring and retains its green color well into the fall. The ideal time to aerate a lawn with cool-season grass is either early in the spring or early in the fall.

    Aerating in early spring allows the grass to recover and regain its strength before it reaches its peak growth period. Alternatively, aerating in early fall ensures the grass isn't too stressed by summer heat and can recover before winter dormancy sets in. Both these timings coincide with periods of active growth, which enables the grass to heal quickly from the process of aeration, close the small holes created in the soil, and reduce the risk of weed invasion.
  • Warm-Season Grass (Bermuda Grass, Bahia Grass, Centipede Grass,St. Augustine Grass): As the name suggests, warm-season grasses flourish in warmer climates, like those in the southern regions of the United States. This type of grass takes a bit longer to turn green in the spring, and it starts to lose its green color as fall approaches. If your lawn consists of warm-season grass, it's best to perform aeration either in late spring or early summer.

    Aerating during late spring or early summer aligns with the active growth phase of warm-season grasses. This is when these grasses are most capable of filling in open areas after soil plugs are removed, reducing the potential for weed proliferation. It also allows the grass to take full advantage of summer's growth period, resulting in a more robust and healthier lawn.

Why is Aeration Needed?

Aeration is needed to break up compact soil and to provide a pathway for grass seed through thatch to the fertile soil beneath. The holes created by aeration allow for greater seed-to-soil contact—a key factor in new grass seed taking root.

Not only does aeration help reduce soil compaction, but it allows water and nutrients to reach deep and through the root zone. This benefits microorganisms living in the soil. These organisms break down existing thatch, improve soil quality and release additional nutrients for healthy grass development.

Nutrients are easily taken in by the plant when aeration is completed. The holes created through aeration in the soil allow roots to expand, resulting in improved turf quality and vitality.

What is Overseeding?

To overseed your lawn means to plant grass seed amidst the existing grass but without breaking up and turning over the soil. An experienced lawn care professional can take an already green lawn and make it even greener by overseeding.

What are the Benefits of Overseeding?

If you aerate and overseed your lawn, there’s a good chance you’ll see a reduction in brown patches and bare spots. Plus, aeration and overseeding acts as a natural weed control.

Overseeding allows new grass varieties to be introduced to a lawn to resist diseases and insect attacks. Similarly, as a lawn thickens with the new seed growth, it will also be better suited to crowd out weeds.

Best of all, new plant growth and subsequent thickening of the lawn will provide you with an aesthetically pleasing property.

For more details about the benefits of aeration and overseeding, contact your local NaturaLawn® of America office.

When is the Best Time to Have Your Lawn Aerated and Overseeded?

The most effective time of year for aerating and overseeding is in the fall for cool-season grasses, such as tall fescue and Kentucky bluegrass, and in the spring or summer for warm-season grasses, such as bermudagrass and zoysiagrass. Planning the right time to aerate your lawn can yield lush results. Early spring is a good time to assess your lawn care needs each year.

To get the most out of aeration, remember to water your lawn thoroughly one or two days before the process. This makes the soil softer and easier to penetrate. Moreover, don't forget to mark any underground sprinklers or other utilities to avoid damaging them during aeration.

Key Takeaways About Aeration and Overseeding

  • Aeration and overseeding are both important lawn care practices that can improve the health and appearance of your lawn.
  • Aeration involves removing small cores of soil from your lawn to relieve soil compaction and allow water, air, and nutrients to penetrate the roots.
  • Overseeding involves planting new grass seed over existing turf to promote thicker, healthier grass.
  • Aeration and overseeding can be done together to maximize their benefits and improve the overall health and appearance of your lawn.
  • Regular aeration and overseeding can help prevent common lawn problems such as weed growth, patchy grass, and soil erosion.

Contact NaturaLawn of America to learn more about a healthy, greener lawn with fewer weeds naturally. Call us at 800-989-5444 today!