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The Ultimate Guide to Finding the Best Crabgrass Killer That Won't Kill Your Grass

best crabgrass killer that won t kill grass

Understanding the Importance of a Good Crabgrass Killer

Crabgrass is one of the most common and persistent weeds that can ruin the look of your lawn by crowding out desirable grasses. It spreads rapidly, and if left unchecked, it can quickly take over your entire lawn, leaving you with an unsightly patch of weeds. To get rid of crabgrass, you need a good crabgrass killer that won't harm the surrounding grass. In this article, we'll discuss some of the best crabgrass killers that are effective yet safe for your lawn.

What is Crabgrass?

Crabgrass is an annual weed that germinates in warm weather and spreads quickly throughout your lawn. It can grow up to 2 feet tall, with leaves that are wider than most grasses. Crabgrass is notorious for creating bare patches in your lawn and interfering with the growth of healthy grass.

How Does Crabgrass Spread?

Crabgrass spreads through its seeds, which can remain dormant in the soil for years. When the conditions are right, such as during warm weather, the seeds will germinate and begin to grow. Crabgrass can also spread through root systems, which can be difficult to control.

Factors to Consider When Choosing a Crabgrass Killer

When choosing a crabgrass killer, there are several factors to consider. These include:

Type of Crabgrass Killer

There are two main types of crabgrass killers: pre-emergent and post-emergent. Pre-emergent herbicides work by preventing the seeds from germinating, while post-emergent herbicides work by killing the crabgrass after it has already sprouted.

Safety

You want to choose a crabgrass killer that is safe for your lawn and the environment. Look for products that are labeled as "safe for lawns" or "pet-friendly."

Effectiveness

Of course, you want a crabgrass killer that actually works! Look for products that have high ratings and positive reviews.

Application Method

Consider how the product needs to be applied. Some products come in granular form, while others are liquid sprays. Choose a product that is easy for you to apply and fits your budget.

The Best Crabgrass Killers That Won't Kill Your Grass

Here are some of the best crabgrass killers on the market that won't harm your grass:

1. Scotts Halts Crabgrass & Grassy Weed Preventer

Scotts Halts Crabgrass & Grassy Weed Preventer is a pre-emergent herbicide that prevents the seeds from germinating. It can be applied in early spring before the crabgrass begins to grow. This product is safe for most types of lawns and won't harm existing grasses.

How to Use:

Apply Scotts Halts Crabgrass & Grassy Weed Preventer evenly over your lawn using a spreader. Follow the instructions on the package for the correct application rate.

Pros:

  • Effective at preventing crabgrass
  • Safe for most types of lawns
  • Easy to apply with a spreader

Cons:

  • May not be effective on established crabgrass
  • Can be expensive compared to other products

2. Ortho Weed B Gon Plus Crabgrass Control

Ortho Weed B Gon Plus Crabgrass Control is a post-emergent herbicide that kills crabgrass and other weeds without harming your lawn. It can be applied directly to the crabgrass using a spray bottle.

How to Use:

Spray Ortho Weed B Gon Plus Crabgrass Control directly onto the crabgrass until it is wet but not dripping. Be careful not to spray the surrounding grass.

Pros:

  • Effective at killing crabgrass and other weeds
  • Easy to apply with a spray bottle
  • Safe for most types of lawns

Cons:

  • May require multiple applications for best results
  • Can be expensive if you have a large lawn

3. Spectracide Weed Stop For Lawns + Crabgrass Killer Concentrate

Spectracide Weed Stop For Lawns + Crabgrass Killer Concentrate is a post-emergent herbicide that is designed to kill crabgrass and other weeds without harming your lawn. This product comes in a concentrate form that can be mixed with water and applied using a sprayer.

How to Use:

Mix Spectracide Weed Stop For Lawns + Crabgrass Killer Concentrate with water according to the instructions on the package. Apply using a sprayer, being careful not to spray the surrounding grass.

Pros:

  • Effective at killing crabgrass and other weeds
  • Comes in a concentrate form that can be mixed with water
  • Safe for most types of lawns

Cons:

  • Can be expensive compared to other products
  • May require multiple applications for best results

Tips for Preventing Crabgrass

In addition to using a crabgrass killer, there are some steps you can take to prevent crabgrass from growing in the first place. These include:

Maintain a Healthy Lawn

Keeping your lawn healthy and well-maintained is one of the best ways to prevent crabgrass from taking over. Mow your lawn regularly, water it deeply and infrequently, and fertilize it as needed.

Aerate Your Lawn

Aerating your lawn can help improve soil drainage and reduce compaction, which can make it harder for crabgrass to grow.

Apply Mulch

Applying mulch to your garden beds can help prevent crabgrass from spreading into these areas. Mulch helps to suppress weed growth and retain moisture in the soil.

FAQs

1. How long does it take for a crabgrass killer to work?

Most crabgrass killers will to work within a few days of application. However, it may take several weeks for the crabgrass to completely die off.

2. Can I apply crabgrass killer in the rain?

It's best to avoid applying crabgrass killer when it's raining or about to rain. The rain can wash away the herbicide before it has a chance to be absorbed by the crabgrass.

3. Can I plant grass seed after using a crabgrass killer?

It's best to wait at least 4-6 weeks after using a crabgrass killer before planting new grass seed. This will give the herbicide time to break down and become less harmful to new grass growth.

4. How often should I apply crabgrass killer?

The frequency of application will depend on the product you are using. Some crabgrass killers can be applied once per year, while others may require multiple applications throughout the growing season.

5. Can I use a natural or organic crabgrass killer?

Yes, there are some natural and organic crabgrass killers available that use ingredients like vinegar or corn gluten meal. These products may not be as effective as chemical herbicides, but they are safer for the environment.


Crabgrass can be a nuisance, but with the right crabgrass killer, you can keep it under control without harming your lawn. When choosing a crabgrass killer, consider factors like effectiveness, safety, and application method. And don't forget to take steps to prevent crabgrass from growing in the first place, such as maintaining a healthy lawn and applying mulch to garden beds. With these tips and tricks, you'll be able to enjoy a beautiful, weed-free lawn all summer long.

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