Crabgrass is one of the most unwanted weeds on any lawn. This weed can spread fast, so it’s better to remove or kill it whenever you spot it on your lawn. You can easily identify it by its grass-like appearance and wide leaves. 

Crabgrass has tough stems that hold heads of seeds on the tips. Each of its seeds, after maturing, can produce and send out more thousands of seeds. It has an extremely high seed production, which explains its rapid spread. So, without proper control, they can invade your lawn in a matter of months.

The good thing is that there are different ready-to-use solutions available that will easily and quickly kill the crabgrass before it can even spread and take over your lawn. However, when choosing the crabgrass killers, you also need to consider your safety and the plants on your lawn. 

With this, our team of experts has tested and reviewed several products and rounded up the best crabgrass killers in the market. To ensure you that we have the safest items, we highlighted their best features and the possible challenges you might face when you use them. So, after going through the reviews and choosing the best product, don’t forget to click on the buttons below to get their best deals on Amazon.

Best Crabgrass Killer Barriers Comparison & Rating

Crabgrass Killer Barriers

Features

BioAdvanced 100532518 Bayer All-in-One Weed & Feed with MicroFeed Action, 12 lb Weed and Feed, 12-Pounds, White
  • also serves as lawn fertilizer
  • applicable for  over 200 listed broadleaf weeds and crabgrass
  • covers 5,000 square feet 
Roundup For Lawns3 Ready-To-Spray (Northern), 32 oz. - Lawn Safe Weed Killer for Northern Lawns, Kills Crabgrass, Dandelion, Clover and Yellow Nutsedge - Kills Weeds, Not the Lawn
  • kills down to the roots of the weed
  • rainproof in as little as 3 hours
  • covers up to 5,000 square feet
Tenacity Turf Herbicide - 8 ounces
  • 40% mesotrione
  • one tablespoon for 2 gallons of water
  • pre-emergence and post-emergence solution
Ortho WeedClear Lawn Weed Killer Ready to Spray - Weed Killer for Lawns, Crabgrass Killer, Also Kills Chickweed, Dandelion, Clover & More, Fast Acting Weed Killer Spray, Kills to the Root, 32 oz.
  • covers 5,000 square feet
  • kills over 200 weeds
  • applicable for a 90-degrees Fahrenheit setting
Natria 100532524 Grass & Weed Control with Root Kill Herbicide Weed Killer, Ready-to-Use, 1-Gallon
  • ready-to-use applicator
  • 450 square feet coverage area
  • visible results within 24 hours

1. BioAdvanced 100532518 Bayer All-in-One Weed & Feed

BioAdvanced 100532518 Bayer All-in-One Weed & Feed with MicroFeed Action, 12 lb Weed and Feed, 12-Pounds, White
Specifications:
97% Overall

Brand

BioAdvanced

Weight

11.84 pounds

Dimensions

5 x 2.65 x 10.25 inches

Form

Granules

97%
efficiency
98%
result speed
96%
ease of use
96%
LONG-TERM effect
Pros:
  • The 12 lbs.  package treats up to 5,000 square feet, while the  24 lbs. can treat up to 10,000 square feet.
  • Has a micro-feed action that improves nutrient intake between feedings and fortifies roots, and increases heat and drought resistance to your lawn.
  • Also serves as lawn fertilizer and feeds your lawn grass, making it greener and stronger.
  • Kills over 200 listed broadleaf weeds and crabgrass.
  • Can be applied any time during spring or early fall.
  • To get the best results, you need to apply when the temperatures are between 50-90-degree Fahrenheit.
  • Formulated for northern lawns.
Cons:
  • A bit hard to apply on a lawn even when using a spreader.
  • Needs to be applied again after some months to prevent weeds from growing back.
Final Take:

This crabgrass killer is an all-in-one. It is a fertilizer and herbicide at the same time. The herbicides kill over 200 broadleaf weeds and grassy weeds like crabgrass. The micro feed action technology helps the fertilizer activate some nutrients in the soil, which improves the nutrient uptake between and during feedings. It also increases heat and drought resistance to your turf. Besides, it's also easy to use. You evenly apply the granules over the lawn. Treat the lawn borders by applying uniformly, then fill the center. You can use the broadcast or the drop spreader methods. It's a perfect crabgrass killer since it has benefits for your lawn, causing not much harm.

2. Roundup For Lawns Ready-To-Spray Weed Killer

Roundup For Lawns3 Ready-To-Spray (Northern), 32 oz. - Lawn Safe Weed Killer for Northern Lawns, Kills Crabgrass, Dandelion, Clover and Yellow Nutsedge - Kills Weeds, Not the Lawn
Specifications:
97% Overall

Brand

Roundup

Weight

0.16 ounces

Dimensions

2.43 x 4.75 x 11.19 inches

Form

Liquid

96%
efficiency
95%
result speed
98%
ease of use
97%
LONG-TERM effect
Pros:
  • Designed to kill weeds and not your lawn. The killer is not harmful to your lawn.
  • Kills crabgrass down to the roots of the weed so they won’t grow back.
  • Controls and kills over 250 lawn weeds.
  • Effective on hard-to-kill weeds like dandelion, clover, yellow nutsedge, and crabgrass.
  • Rainproof in as little as 3 hours.
  • Ready to use applicator helps to broadcast application to the entire lawn.
  • Covers up to 5,000 square feet.
  • Instantly kills weeds in their early growth stages.
  • Can use a garden hose with water to spray.
Cons:
  • Takes time to see the result of the solution to the weeds and its effect varies depending on the type of weeds.
  • Over-application can cause minor damage to the grass and plants on your lawn.
Final Take:

This crabgrass killer is very effective with the right application and consistency. It's also easy to use since you need to connect the sprayer to the garden hose. You then extend the hose to the furthest area you want to treat. Point the nozzle to the weeds you want to spray. Switch the ON button and spray evenly over the weeds. After you finish spraying, switch OFF and turn off the water as well. When through, disconnect the sprayer from the hose. It is ideal since it does not kill your lawn. The crabgrass killer will kill the roots, ensuring that the plants don't grow back again in your lawn.

3. Tenacity Turf Herbicide

Tenacity Turf Herbicide - 8 ounces
Specifications:
95% Overall

Brand

Tenacity

Weight

10.6 ounces

Dimensions

2 x 2.5 x 4.5 inches

Form

Concentrated Liquid (Needs Dilution)

97%
efficiency
96%
result speed
91%
ease of use
97%
LONG-TERM effect
Pros:
  • Pre-emergence and post-emergence solution. The weed can absorb the soil's solution, and it can kill the weed while it’s growing.
  • Kills broadleaf and grassy weeds like crabgrass, clovers, dandelion chickweed, carpetweed, foxtail, goosegrass, nutsedge, wild carrot, and many more.
  • Destroy tough weeds to the roots; hence they can't easily re-grow.
  • Provides a long-term crabgrass control of up to 4 tills.
  • The active ingredient is 40% mesotrione, a natural compound that inhibits photosynthesis in susceptible plant species.
  • Eliminates weeds at seeding; hence your lawn grass can grow and flourish.
  • Comes with a calibrated syringe to ensure accuracy when measuring the concentrated solution.
  • One tablespoon of the concentrated solution is diluted with 2 gallons of water.
Cons:
  • Works best in specific conditions. Best applied during late winter (between 40-50 degrees temperature) where the solution can stay longer in the plant system due to slow growth.
Final Take:

This is undoubtedly one of the most effective crabgrass killers that you should try at your home. It prevents and controls crabgrass before they germinate from the seeds, and if others have already grown, it gets rid of them as well. More so, it can kill or prevent the crabgrass from invading your lawn for up to 4 tills. It is a natural herbicide since it has mesotrione as an active ingredient naturally produced by the bottlebrush plant. The crabgrass absorbs this herbicide through shoots, roots, and leaves, altering the process of photosynthesis retarding the crabgrass, and eventually kills the weed. This is the best crabgrass killer if you want to prevent or control crabgrass.

4. Ortho WeedClear Ready to Spray Lawn Weed Killer

Ortho WeedClear Lawn Weed Killer Ready to Spray - Weed Killer for Lawns, Crabgrass Killer, Also Kills Chickweed, Dandelion, Clover & More, Fast Acting Weed Killer Spray, Kills to the Root, 32 oz.
Specifications:
95% Overall

Brand

Ortho

Weight

2 pounds

Dimensions

2.33 x 5.5 x 11.25 inches

Form

Liquid

97%
efficiency
93%
result speed
92%
ease of use
97%
LONG-TERM effect
Pros:
  • Treats up to 5,000 square feet.
  • Easy to apply. You connect to the garden hose.
  • Rainproof in just one hour.
  • Kills over 200 weeds to the root. Hence they can't grow again.
  • Has a ready-to-use applicator which makes it easy during application.
  • Effective when applied on young and actively growing weeds.
  • Will only kill the weeds, including crabgrass, but won't kill your lawn.
  • Formulated for northern lawns.
  • Can be used on grasses like buffalo grass, Bermuda grass, Kentucky, ryegrass without harming or killing them.
  • Daytime application when the temperatures are below 90-degrees Fahrenheit.
Cons:
  • Controlling the nozzle of the ready-to-spray package is a bit of a challenge.
  • Takes a long time to kill other kinds of weeds.
Final Take:

This is definitely a good spray to kill the stubborn crabgrass on your lawn. This is so because it kills crabgrass even with turf on the lawn, and it won't kill or make the turf turn its color. Like any other sprayer, you connect it to the garden hose and start using it after turning the water. Ensure you apply during spring and fall when the crabgrass is young and growing to get significant results. It also kills the roots; hence you don't have to worry about the crabgrass growing back again.

5. Natria 100532524 Grass & Weed Control Herbicide

Natria 100532524 Grass & Weed Control with Root Kill Herbicide Weed Killer, Ready-to-Use, 1-Gallon
Specifications:
94% Overall

Brand

Natria

Weight

2.25 pounds

Dimensions

2.33 x 8.5 x 12 inches

Form

Liquid

95%
efficiency
95%
result speed
90%
ease of use
94%
LONG-TERM effect
Pros:
  • Has an exclusive formula that kills to the roots within minutes.
  • Results are seen after 24 hours.
  • Easy to use. It is a natural way to get rid of crabgrass to their roots and is safe in the environment.
  • Treats an area of up to 450 square feet.
  • Should be sprayed to the weeds until the foliage is wet. This maximizes its effectiveness.
  • Has a ready-to-use applicator for a quicker application.
  • Kills weeds like crabgrass, poison ivy, and clover.
  • Can be applied on driveways, stepping stones, patios.
Cons:
  • Using the included bottle sprayer on a large lawn can be too tedious.
  • Needs to be applied generously to assure that it kills even the roots of the weeds.
  • Small coverage area.
Final Take:

This is a non-selective herbicide that kills a wide range of weeds. The crabgrass killer is organic and natural because it is tough on weeds and easy on the environment. It has an exclusive formula that kills the crabgrass to the roots in a matter of some minutes. This herbicide is easy to use since it has an applicator whereby you use it to spray on the weeds until the foliage is completely wet. It's important to ensure that you have thoroughly covered the weed for it to work effectively. If you need to apply on individual weeds, apply the solution at the center of the plant. Repeat the application to control new weeds from emerging and growing from the seeds and re-growing from perennial weeds. This is a very effective and easy-to-use herbicide that you should consider.

Best Crabgrass Killer Barriers - Buyer's Guide

coverage

This is simply concentration potency. Most manufacturers indicate the area to be covered by a certain measurement of the herbicide. Know the size of your lawn to see how much concentration or spray you will need. This is very important since you will get accurate measurements.

forms

You need to understand the different forms of herbicides and how they work. Some come in ready-to-use spray whereby they require you to connect to the garden hose, and you immediately start using. Others come in concentrated solutions whereby you will need to dilute the solution, and finally, some are granular. It would be best if you had a spreader to apply this type of herbicide. Choose wisely the one that has minimal dangers when measuring or sprinkling.

safety

This is also a significant factor to consider. If you have other turf types that you would want to keep, always go for the crabgrass killer ideal for killing the weeds and not killing or destroying your lawn. Get herbicide depending on the turf and weed that you have in the lawn.

versatility

This is ideal if you have other weeds besides crabgrass that you want to get rid of. Most of the herbicides kill over 200 weeds besides crabgrass. This is ideal since you will protect your lawn from potential unwanted weeds that might invade your lawn in the future.

ease of use

It is important to consider how easy it will be for you to apply the herbicide. Some of them are just ready to use; hence very easy to handle and use. Others require you to dilute the concentrated solution, requiring your time to come up with the required measurements for the herbicide to work effectively. Yet others require you to scoop and sprinkle but need a lot of care.

Best Crabgrass Killer Barriers - FAQs

When should I apply crabgrass killer?

Crabgrass killer should be applied when the temperatures are below 90-degrees Fahrenheit. Also, apply just before spring to kill the seeds of the weeds before they germinate.

Should I pull out the dead crabgrass?

Yes. It's crucial to pull them out since they might drop seeds. The seeds remain viable and can germinate the next spring season. Always pull them out, but carefully.

How long does a crabgrass killer take to work?

The herbicide takes two weeks, which is also the time it takes for the crabgrass to complete its seeding process. Apply the herbicide before the weed completes the seeding process.

Does crabgrass herbicide kill grass too?

You can use some crabgrass killers without killing grass on your lawn. Always read the instructions before purchasing to get the best that does not kill the lawn.

Author

Jessie is a landscape artist famous among folks in Los Angeles who are obsessed with keeping their lawns pristine and divine. He worked for BrightView Holdings, Inc. back in 2015 and now owns a brick-and-mortar business that offers all kinds of gardening tools and machines. Ask him all you need to know about your mower or your fertilizer, and he will answer you while sipping a cup of coffee.