5 Clear Signs You Need to Overseed Your Lawn 

spreading grass seeds with a hand

Is your turf a patchy battlefield of worn-out grass and invading weeds? These are signs you need to overseed your lawn (and probably fix an underlying turf problem).    

Overseeding is an annual maintenance task that encourages new turf growth. When your grass turns yellow, grows slowly, or develops patches, the lawn could benefit from overseeding.

But remember, overseeding does not cure the issue behind these signs. Always tackle the root of the problem in addition to overseeding. Otherwise, your new grass might end up looking just as worn out as the old. 

Signs You Need to Overseed Your Lawn

Overseeding is the process of planting grass seed on existing turf. It enhances your lawn’s density and fills in bare spots. It’s beneficial to do it annually as part of your lawn care routine. 

If you’re not already in the habit of overseeding regularly, it’s important to recognize the telltale signs that your lawn requires this rejuvenating treatment. Take a look at the following signs:

1. Grass Looks Worn Out

Damaged lawn with bare spots.
Photo Credit: ChebanenkoAnn / Shutterstock

If your grass looks like it’s been through a tough workout and is begging for a nap, it’s a clear sign it’s lost its vigor. This may be due to poor soil conditions and low nutrients. Apply some fertilizer and soil amendments to help boost the soil and then overseed to encourage new growth. 

2. Grass Is Not Growing

Is your grass acting like it’s on a permanent vacation, refusing to grow no matter what you do? Slow growth is usually the first hint that something’s off before brown patches and dead spots start popping up. It’s a clear sign your lawn is suffering from an underlying issue. 

Overseeding can help boost new growth and speed up recovery, but ensure you figure out what’s causing the slow growth in the first place. You also should keep in mind that grass stops growing at certain times of year.

3. Grass Is Losing Its Color

Dry grass
Photo Credit: Needpix

If your lawn is sporting yellow and brown spots, it’s a sign your grass is starving for nutrients. Discolored grass usually means the grass roots aren’t getting what they need to stay green and healthy. 

When those yellow or pale patches appear, it’s time to break out the overseeding supplies, fertilizer, and soil amendments. The fertilizer and soil amendments will solve the lack of color, and the overseeding will add some new green.

4. Grass Is Becoming Thin

Is your lawn losing its lush, full figure? Sometimes, when the soil is too compacted, it’s tough for roots to grow properly and spread. Give your lawn a little breathing room with aeration first and then overseed to help it recover its dense and healthy appearance. 

5. Weeds Are Invading the Grass

When your grass is struggling, weeds see it as an open invitation to take over. While overseeding won’t get rid of all the weeds in your yard, it can help your grass stage a comeback. By thickening up your lawn, overseeding makes it harder for weeds to compete for space and resources. 

How to Overseed Your Lawn

Check out our comprehensive guide on How to Overseed Your Lawn in 8 Simple Steps. Here’s what you can expect: 

A hand holding a soil pH test tube next to a color-coded guide
Photo Credit: Backyard Boss / Flickr / CC BY 2.0
  • Test your soil: Before you start, give your soil a quick check-up to see if its pH and fertility levels are good for the type of grass you will overseed. If not, make the necessary adjustments. 
  • Mow low: Give your lawn a fresh cut at the lowest height recommended for your grass type. 
illustration explaining thatch on grass
Photo Credit: Juan Rodriguez
  • Dethatch and aerate: Dethatch to remove that dense mat of dead grass, roots, and leaves that stops seeds from reaching the soil. Aerate to loosen the soil, improve airflow, and make it easier for grass roots to grow. 
  • Spread the grass seed: Use a handheld seeder for small patches, a drop spreader for medium-sized lawns, or a broadcast spreader for larger areas. 
Lawn sprinkler spraying water over lawn
Photo Credit: Виктория Котлярчук / Adobe Stock / License
  • Water your lawn: Keep the soil moist to help those seeds settle in and grow. 
  • Avoid mowing or heavy traffic: Give your new grass babies some peace. Hold off on mowing or heavy foot traffic until the new grass is about 2 or 3 inches tall. 

For more detailed information about how to prepare your lawn for overseeding, check out these related articles: 

Benefits of Overseeding Your Lawn

Close-up of person pouring grass seed out of their hand
Photo Credit: Elena Elisseeva / Shutterstock

These are some of the benefits of overseeding your lawn:

  • Improved appearance: Overseeding fills in those bare spots and thin areas, giving your lawn a lush, full look.
  • Natural weed control: By thickening up your grass, overseeding helps crowd out weeds.
  • Less need for fertilizers and water: Overseeded lawns can save you time and money.
  • Preventing soil erosion: Bare patches and thin areas leave your soil exposed and vulnerable to erosion. Overseeding promotes healthy root growth, keeping your topsoil in place.

FAQ About Overseeding Your Lawn

When is the best time to overseed my lawn?

The best time to overseed your lawn depends on the type of grass you have. For warm-season grasses, the optimal time to overseed is late spring or early summer. For cool-season grasses, the ideal time to overseed is early spring or early fall. 

Should I overseed and aerate at the same time?

Yes, it is recommended to aerate your lawn before overseeding. Aerating first helps to loosen the soil, allowing the new grass seeds to penetrate deeper into the soil and establish better. This combination improves the chances of successful germination and growth of the new grass. Follow our guide How to Aerate and Overseed Your Lawn to ensure the process goes smoothly.

Can I mow my lawn after overseeding?

You should wait until the new grass reaches at least 3 to 4 inches in height before mowing your lawn after overseeding. Make sure the lawn mower blade is sharp to prevent damaging the seedlings. See our guide How to Sharpen Lawn Mower Blades if you haven’t sharpened them before.

Hire a Lawn Care Pro

Once your overseeded lawn has sprouted and is growing strong, you’ll want to keep it looking its best. Mowing and maintaining a lush lawn can be a big job. Hire a lawn care pro for a helping hand so that your lawn stays in its best shape.

Main Image Credit: dean / Adobe Stock Free / License

Cecilia Acevedo

Cecilia Acevedo

Cecilia is your home expert with a focus on gardens. When she's not writing about cozy living, she's digging into the world of gardening. Cecilia shares down-to-earth tips to make your outdoor space thrive. Get ready to roll up your sleeves and join her in cultivating a greener life through her stories full of gardening insights and a love for the great outdoors.