How to Get Rid of Thick Grass in Lawn


Thick grasses are a variety of grass weeds and invasives. They produce large numbers of seeds, which germinate whenever there is adequate soil warmth and moisture or when carried by windblown water to bare ground.

Thick grasses may overtake the lawn in dense mats that crowd out other plants and reduce the health and beauty of turfgrass. In this article, I will discuss how to get rid of thick grass in lawn. So let us get started.

How to Get Rid of Thick Grass in Lawn

Stepwise Guide on How to Get Rid of Thick Grass in Lawn:

1. Use a Lawn Mower:

Use a lawnmower to cut the thick grass on your lawn. If you have a push-type mower, remove the bag that catches clippings and then mulch it into your yard. You can also use a good-quality weed eater for this purpose.

Both methods will help thicken up thin areas in a lawn, but they can leave brown patches in your property because the blades of grass are removed from the ground rather than being cut or trimmed.

2. Use Roundup:

If you have brown patches leftover from using a trimmer or weed eater, apply Roundup directly to those spots. Roundup will kill any plant it comes in contact with. In addition, the active ingredient in Roundup is Glyphosate, and since grass is a plant, the grass will die if you use this herbicide on your lawn.

3. Use a Dethatcher:

Use a dethatcher to pull up dead or dying grass from your yard. This process is often done in the fall when people want to clean up their yards for winter, but you can also do this in early spring before new growth begins.

After removing dead patches of grass with a dethatcher, rake the soil level with either a steel garden rake or a leaf rake to remove small rocks and other debris that may have been brought to the surface by the dethatcher.

4. Plant New Grass:

Plant New Grass to Get Rid of Thick Grass in Lawn

After pulling up all of the dead grass in your lawn with a dethatches, it is time to plant new grass seed. There are several grass types you can choose from, including rye, fescue, or centipede grasses.

You will need to fertilize and water the area until the seeds take root and begin growing. The best time for this project would be late spring, when temperatures are warm enough for planting but not too hot where they will bake in direct sunlight.

5. Topdress with Soil:

The final step is to topdress the area with new soil. Next, spread a 1/2-inch layer of well-rotted manure over the seeded area and then sprinkle it with about 1/4 inch of lime.

The final step is to cover this process with between 1 and 4 inches of shredded bark mulch, which will help keep the soil moist, reduce weeds and help retain nutrients in your yard or garden.

Precautions While Performing How to Get Rid of Thick Grass in Lawn :

The best precaution that needs to be taken is that you should not dig your garden too much as this can damage the roots of the plants, and they may never grow again.

Should Not Dig Your Garden

Also, once the thick grass is removed, there will be a thin layer of soil coming out with them, so you need to put some good amount of soil again so that the plants can start growing.

You must also check for any young saplings and remove them if present because these saplings are very dangerous as they will become big trees in the next few years, and removing them at the initial stage itself, will save you from future damages.

Before removing thick grass, make sure to cut it first low. This step is essential because by mowing first lawns or fields look fresh, you will also be able to remove the grass easily.

Generally, thick grass in the property is withdrawn by weed eaters available at a meager cost, so keeping this in mind, people prefer buying them over hiring someone.

Frequently Asked Questions:

How to identify and control thick grasses?

How to identify and control thick grasses

In urban and residential areas, the weed that causes the most problems is Johnsongrass. This perennial grass can grow to a height of six feet in a short time. It also blooms at an early age and sets a seed early in its development.

Sources remain viable for years, perhaps as long as ten years after maturity, so control does not necessarily mean eradication.

Crabgrass is the dominating weed problem in golf courses and sports turfs because it germinates from seed each year. However, in crops such as cotton, Johnsongrass is a significant pest where only row cultivation is practiced or if there are inadequate herbicides available for burndown applications.

Mowing thick-growing grasses will make them grow faster and be more challenging to control. However, these weeds have a high nitrogen requirement, so fertilization will increase their vigor and often makes them tolerable in lawns.

In pastures or grasslands, perennial grassy weed species such as Johnsongrass and Bermuda grass are the main problem.

In turfgrass, these thick-growing weeds prevent sunlight from reaching desirable plants. This can lead to thinning of turf stand due to uneven growth. In addition, the uncontrolled spread of Virginia Buttonweed will displace most warm-season grasses (it is tolerant of shade).

At the same time, Barnyard Grass or Crabgrass will do the same but only during its active growth period in spring and early summer when it germinates before cool-season grasses.

What are The Disadvantages of Thick Grasses on Lawn?

Thick grass is the most common problem in lawns. It makes your property look dull and dirty after a certain period. Thick grass can also give you a difficult time while mowing it with a mower.

In addition, your property may not receive the necessary sunlight, which may lead to its death. There are many other disadvantages of having thick grass on your property such as:

1- The healthy parts of the lawn get covered by thick blades, thus blocking out air from reaching these parts. Healthy grass needs air to survive properly. Therefore, this causes suffocation leading to the development of a thatch layer underneath the dirt which blocks airflow for healthy roots to absorb oxygen they need from the atmosphere. Thus, make changes in blades length often to keep the grass growth in control.

2- The healthy parts of your lawn are covered with dirt, reducing airflow to these parts, which leads to the development of a thatch layer underneath the ground blocking airflow for healthy roots to absorb oxygen they need from the atmosphere.

3- Increases cooling costs due to additional heat-trapping effects by thick grass blades. This is why it’s often recommended to cut high grass short towards evening when the temperature falls, and there is less danger of evaporation loss.

4-  Thick blades make mowing difficult, resulting in injuries on hands, arms, legs, or feet during mower operation. And this causes terrible effect on health as well as reduces your lawns esthetic appeal greatly. If you want to avoid this problem, you must follow the tips we mention in this article.

Thick Blades Make Mowing Difficult

5- Thick grass is challenging to grow and maintain,, resulting in additional costs such as hiring extra hands or using costly lawn care services whenever your lawn needs maintenance.

6-  Thick blades don’t allow healthy parts receive sunlight properly. Thus, it reduces the growth of grass and the quality of the overall turf area.

7- Moves dirt with blades during mowing, which adds up to the weight of your lawn and makes it feel like a heavy wet blanket on the soil. This also causes suffocation and choking effect on healthy grassroots, leading to dead patches among nutritious grasses.

Also, make changes in blades length often to keep the grass growth in control.

What are The Advantages of Having A Lawn With a Healthy Grass?

Having healthy grass on your lawn is the key to keep it clean, beautiful, and esthetic. And this requires proper cutting blades length at the right time with sharp cutters, which will enable you to mow your lawn easily without any problem.

Healthy grass covers all parts of your property preventing them from dirt accumulation or suffocation by thatch formation too deep under the turf area.

Thus, it allows airflow into these areas, thus rooting out harmful germs causing bad effects on health as well as reducing cooling costs significantly due to reduction in heat-trapping effects by healthy green grass blades.

Having thick grass blades is also more cost-effective because they allow healthy parts to receive more light for healthy growth and increased water intake due to their deep roots.

These healthy blades will also be able to resume the photosynthesis process thus increasing the organic content of your lawn.

This allows grassroots to produce more nutrients that are essential in having thick blades, eliminating weed germs that could grow between these grass blades which you can get rid of by termiticide dust or granules.

Do Grass Clippings Cause Yard Problems?

Grass clippings do not cause any problems when it’s left on your lawn during mowing operations. However, this may create disorder if you allow these clippings to pile up over the soil surface causing damage to your yard since conditions become moist thereby favoring the development of harmful weeds.

Thus, you may want to collect these clippings using a lawnmower bag so you can dispose of them properly if you don’t want these to mold thus worsening this yard problem.


In conclusion, I hope that this article has offered all the necessary instructions on how to get rid of thick grass in lawn. Ensure all the precautions. Thank you and have a nice day!

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