How To Kill Crabgrass

Crabgrass is a common weed that can invade your lawn and garden. It can take over your lawn and make it look unsightly. However, there are ways to kill crabgrass and keep your lawn looking healthy and green. In this article, we will discuss different methods and techniques to effectively get rid of crabgrass.

What is Crabgrass?

Crabgrass is a type of weed that is commonly found in lawns and gardens. It is an annual weed that can grow up to 3 feet tall. It is usually light green in color and has wide leaves. Crabgrass is a fast-growing weed that can quickly take over your lawn if left untreated.

Why Should You Kill Crabgrass?

Crabgrass is not only unsightly but it can also negatively affect the health of your lawn. It can compete with your grass for nutrients, water, and sunlight. This can lead to a thinning of your lawn and an overall reduction in the health of your grass. Additionally, crabgrass can produce thousands of seeds that can germinate in the following years, making it even harder to control.

How to Prevent Crabgrass?

Preventing crabgrass from growing in the first place is the best course of action. The best way to prevent the growth of crabgrass is to maintain a healthy lawn. This includes regular mowing, watering, and fertilizing. Additionally, you should avoid overwatering your lawn as this can create the perfect environment for crabgrass to grow.

How to Kill Crabgrass with Chemicals?

Chemical treatments are one of the most effective ways to kill crabgrass. There are two types of chemical treatments: pre-emergent and post-emergent. Pre-emergent treatments are applied before the crabgrass has a chance to germinate. They work by creating a barrier on the soil that prevents the seeds from germinating. Post-emergent treatments are applied after the crabgrass has already germinated. They work by killing the crabgrass after it has started to grow.

What Chemicals are Used to Kill Crabgrass?

The most common chemicals used to kill crabgrass are herbicides. Herbicides work by disrupting the growth and development of the weed. Some common herbicides used to kill crabgrass include glyphosate, quinclorac, and dithiopyr. It is important to follow the instructions on the label when applying herbicides.

How to Kill Crabgrass Organically?

If you prefer an organic approach to killing crabgrass, there are several options available. One of the most effective ways to kill crabgrass organically is to pull it out by hand. This can be a time-consuming process, but it is effective if done correctly. Another option is to use organic herbicides, such as vinegar or corn gluten meal.

Can You Use Salt to Kill Crabgrass?

While salt can kill crabgrass, it is not recommended as it can also harm other plants in your lawn and garden. Additionally, salt can remain in the soil for a long time, making it difficult to grow plants in that area in the future.

How to Kill Crabgrass Naturally?

In addition to pulling out crabgrass by hand, there are other natural methods to kill crabgrass. One of the most effective natural methods is to smother the crabgrass with a layer of newspaper or cardboard. This will prevent sunlight from reaching the weed, causing it to die.

How to Remove Dead Crabgrass?

After you have successfully killed crabgrass, it is important to remove the dead weed from your lawn. This can be done by raking or pulling it out by hand. Once you have removed the dead crabgrass, you can reseed the area with grass seed to fill in any bare spots.

What to Do After You Kill Crabgrass?

After you have successfully killed crabgrass, it is important to take steps to prevent it from growing back. This includes maintaining a healthy lawn, avoiding overwatering, and using pre-emergent herbicides to prevent future growth.


What is the Best Time to Kill Crabgrass?

The best time to kill crabgrass is in the spring or early summer before the weed has a chance to produce seeds.

How Long Does it Take to Kill Crabgrass?

The length of time it takes to kill crabgrass depends on the method used. Chemical treatments can work within a few days, while organic methods may take several weeks.

Can Crabgrass Spread to Other Lawns?

Yes, crabgrass can spread to other lawns through seeds or by root fragments. It is important to take steps to prevent the spread of crabgrass to other areas.

How Often Should You Apply Crabgrass Killer?

The frequency of crabgrass killer application depends on the method used. Some chemical treatments may only need to be applied once a year, while organic methods may need to be applied more frequently.


Crabgrass can be a nuisance, but it is not impossible to get rid of. By using the methods and techniques outlined in this article, you can effectively kill crabgrass and keep your lawn looking healthy and green. Remember to follow the instructions on any chemical treatments used and take steps to prevent future growth. With a little effort and patience, you can get rid of crabgrass and enjoy a beautiful lawn.