How do you plant new grass seed over existing grass?

Asked By: Sergio Seupel | Last Updated: 9th June, 2020
Category: home and garden landscaping
3.9/5 (381 Views . 30 Votes)
This is the optimal time to begin working toward a healthy stand of grass for next season by planting seed in an established lawn by overseeding. Cut the grass in your lawn to a height of 2 inches with a lawn mower. Reduce the height of grass to allow for easier raking and seeding. Rake or bag clippings.

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People also ask, how do you plant new grass in old grass?

How to Replant Lawn Grass

  1. Clear the area. Kill weeds and any remaining poor-looking grass with a non-selective herbicide about 2 weeks before you want to seed your lawn.
  2. Prep for success. Now is a great time to core aerate the area if your soil is really compact.
  3. Select your grass seed.
  4. Spread your grass seed.
  5. Feed for growth.
  6. Water daily.

Beside above, will grass seed grow if I just throw it down? If you simply throw grass seed onto compacted soil, you will get poor germination. I'm not a lawn expert, but if I was going to go to the cost and effort of spreading grass seed on my existing lawn, I would definitely spread a thin layer of finely sifted compost or topsoil over the top of the seed.

Herein, can you plant grass seed on top of existing grass?

Sowing new grass seed over your existing lawn is known as overseeding. While it's possible to simply sow the new grass seed over your existing lawn, taking the time to prepare your lawn beforehand will increase the likelihood of seed germination and improve your end result.

Can you just sprinkle grass seed on lawn?

By applying grass seed over an existing lawn, you can help fill in bare spots and reinvigorate your lawn. The weather, kids, and pets can be tough on lawns. Lack of water, too much heat, wear & tear, and other problems can make it look worn and thin. You can help reinvigorate your lawn by overseeding.

34 Related Question Answers Found

How do you reset a lawn full of weeds?

The Way to Restore a Lawn Full of Weeds
  1. Cleaning and mowing. Start with cleaning your yard.
  2. Weed killer. Use a sprayer and apply the weed killer directly to the weeds.
  3. Aeration. To aerate your land correctly, you can use both hand or power tools.
  4. Plant new grass seed.
  5. Water the soil.
  6. Fertilizing the lawn.

Can you put topsoil over grass?

In most cases, a lawn can withstand the addition of a soil layer that is only 1/4 to 1/2 inch thick. You can spread topsoil evenly and accurately over the lawn by using a drop-spreader, or you can spread topsoil simply by flinging it with a shovel.

How do I prepare my lawn for seeding?

Prepare Your Soil
First, use a sharp shovel to remove any existing grass, or, if it is a large area, rent a sod cutter to get the job done faster. Then, take a walk around and inspect the area. Remove large rocks and debris, fill in low spots, and if your soil is compacted, work it over with a tiller.

Can you put down too much grass seed?

All plants, including grass plants, need adequate soil space for roots to spread and develop. If you put down too much grass seed, you will encourage competition that will cause your grass seedlings to struggle after germination because there will be excessive competition for sunlight, soil nutrients, and water.

How many acres does a 50 lb bag of grass seed cover?


For example, if the recommended seeding rate for a specific blend of grasses is 6 pounds per 1,000 square feet, multiply 6 by 43.56 to get 261.36. Thus you would need just over 261 pounds of seed for 1 acre.

Should you put top soil over grass seed?

Spreading topsoil across your yard may seem like a simple way to protect your newly spread grass seeds from hungry birds, but these small seeds cannot force their way through heavy earth. In fact, a topsoil layer effectively suffocates your lawn before it even has a chance to grow.

How do you spread topsoil over existing grass?

Spread the soil using something flat, like the back side of a heavy garden rake, working it into aeration holes and covering low spots. Make sure the top-dressing is no more than 1” deep (preferably ½” or less) over the existing grass. Keep working the mixture until your grass peeks through and the depth is even.

Do you have to aerate before overseeding?

The best time to aerate your lawn is during the fall before you begin a fertilization program or decide to overseed. The aeration spikes should penetrate the soil at least 1 ½ inches deep, depending on your existing soil conditions. Run your irrigation system after the turf has been aerated.

Should I kill weeds before overseeding?


Roundup can be used to kill all vegetation before seeding(5-day waiting period). Mow the lawn short, 1-1/2 inches before overseeding to keep grass and weeds from competing with new seedlings. If thatch is 3/4 inch or more, it is easier to strip off the thatch with a sod cutter and reseed.

How long after overseeding can I mow?

In general, however, you should not do any mowing during the first two weeks to four weeks after planting the new grass seeds. They should not be disturbed while root establishment occurs. ?As for how much you should cut, you should typically mow at least three inches high.

How do I speed up grass seed germination?

  1. Prepare the ground carefully.
  2. Rake the soil to an even level throughout.
  3. Pregerminate the grass seed.
  4. Spread the pregerminated seed over the prepared soil.
  5. Cover seeds with a very light mulch of compost or straw, according to Lawncare.net.
  6. Water the pregerminated seeds frequently.

Should I put straw over grass seed?

Straw may be used to cover grass seeds. Straw is often used to cover newly planted grass seed to reduce the amount of seed relocated by wind and water. Straw is preferred over hay because of its lower seed content. Straw also holds moisture and keeps the grass seeds and seedlings from drying out.

Will grass fill in bare spots on its own?

Preparing the soil, amending it with compost and fertilizer and, above all, maintaining irrigation will get grass regrowing quickly. Keep the area free from traffic for several weeks, and you will have the bald patches repaired in less than a month.

How often should grass seed be watered until it germinates?


New grass should be watered twice a day (or more under dryer conditions) to keep the top two inches of soil moist at all times. Water daily until all of the grass seeds have germinated, then it will be ready to begin a regular watering schedule.

How much will a 50 lb bag of grass seed cover?

Directions - Recommended Seeding Rates: New Establishment 4-5 lbs/1000 sq ft Renovation 20-50 percent existing cover 3 to 4 lbs/1000 sq ft 50 to 75 percent existing cover 2 to 3 lbs/1000 sq ft Recommended Maintenance Practices: Shade Mix responds best to a moderate fertility program.

What month is best to put grass seed down?

Grass seed is best sown from late summer to mid-autumn; there is less competition from weeds, and the soil is warm, and damp from rain. Perfect for seeds to germinate. If you miss the opportunity to sow in autumn, try in mid-spring, but only if you can give the new grass plenty of water.