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10 Best Crabgrass Killers of 2021 – Reviews & Top Picks

Spectracide Weed Stop For Lawns Plus Crabgrass Preventer Granules

Unsightly and difficult to remove, crabgrass can make your lawn and surrounding gardens look more like weed patches. Considered a finger-grass, the opportunistic crabgrass seeks out one narrow spot to sprout and then extends its unattractive tentacles over healthy grass, garden beds, and walkways.

When you’ve had enough of this lawn and garden invader, it’s time to get serious and purchase a specially formulated weed killer designed to eliminate crabgrass. However, selecting the best crabgrass killer for your yard may prove as challenging as getting rid of the weed itself.

Fortunately, we’ve narrowed down the selection to the 10 best crabgrass killer products. We’ve supplied you with useful reviews, as well as quick-reference pros and cons lists. With the right crabgrass killer, your yard and lawn can look welcoming and beautiful once more.

A Quick Comparison of Our Favorites in 2021:

Image Product Details
Best Overall
Green Gobbler Green Gobbler
  • Kills weeds fully in 24 hours
  • Certified for organic use
  • Glyphosate-free
  • Best Value
    Second place
    BioAdvanced All-in-One BioAdvanced All-in-One
  • Safe to apply to full lawn
  • Rainproof after an hour
  • Kills over 200 more varieties of weeds
  • Premium Choice
    Third place
    Syngenta Tenacity Turf Herbicide Syngenta Tenacity Turf Herbicide
  • Concentrated mixture
  • Includes eye dropper
  • Kills crabgrass both before and after it emerges
  • Scotts 49900 Halts Crabgrass Killer Scotts 49900 Halts Crabgrass Killer
  • Apply in the early spring
  • One application to see results
  • Easily applied with a spreader
  • PBI Gordon Ornamec PBI Gordon Ornamec
  • Selective weed control
  • Safe to use around healthy plants
  • Concentrated formula
  • The 10 Best Crabgrass Killers Reviewed:

    1. Green Gobbler Weed & Grass Killer — Best Overall

    Green Gobbler Vinegar

    Our top pick goes to the Green Gobbler weed and grass killeras the best overall product available. When you want fast, effective results, this vinegar-based formula works to eliminate crabgrass and other types of weeds within hours. After 24 hours, crabgrass is fully withered and obliterated.

    Best of all, since it’s certified for organic use, you can use Green Gobbler with confidence anywhere around your property without worrying about exposing your family members and your pets to harmful chemicals. The formula is glyphosate-free and made with natural ingredients, including ethanol derived from corn.

    The reasonably priced gallon container comes ready to use without requiring dilution. You’ll need to supply the pump sprayer, however. For best results, avoid applying on rainy, windy days.

    Be aware to only apply this product to weeds you wish to eliminate. It should never be sprayed across your lawn. The non-selective formula kills any and all vegetation on which it’s applied.

    • Fast, effective results
    • Kills weeds fully in 24 hours
    • Certified for organic use
    • Glyphosate-free
    • Natural ingredients
    • No dilution required
    • Do not apply to healthy lawn or plants
    • Less effective in rainy and windy weather

    2. BioAdvanced All-in-One Crabgrass Killer — Best Value


    If you’re looking for the best crabgrass killer for the money, you may want to consider BioAdvanced All-in-One crabgrass killer. For an affordable price, this concentrated formula can be safely applied across your entire lawn, as it only targets the weeds you wish to eliminate, including crabgrass and over 200 varieties of broadleaf weeds.

    BioAdvanced starts working as soon as you apply it. It’s rain proof within an hour following application. While this herbicide works well on most grass types, be sure to check the listed grasses that are not compatible. Bermudagrass may yellow after application, and other grass types may suffer worse damage.

    You can use this product in tank sprayers, with dial-n-spray and hose-end sprayers, and with a hose-end sprayer application. For best results, apply in temperatures below 90 degrees and refrain from mowing for a few days after application.

    • Best value
    • Safe to apply to full lawn
    • Formulated to eliminate crabgrass
    • Kills over 200 more varieties of weeds
    • Begins working immediately
    • Rainproof after an hour
    • Can be used in most sprayers
    • Not suitable for some grasses
    • Not effective in temperatures exceeding 90 degrees

    3. Syngenta Tenacity Turf Herbicide — Premium Choice

    Tenacity Turf Herbicide

    We chose Syngenta Tenacity turf herbicide as our premium choice. This systemic herbicide successfully kills and fully eliminates crabgrass and other invasive weeds both before and after they emerge.

    While it’s priced much higher than other herbicides on our list, its highly concentrated formula will last. A very small amount of this product is all that’s needed for dilution into a gallon of water. In fact, this herbicide resembles medication, as it’s packaged in a small bottle and comes with an eye dropper with measurement marks.

    Keep in mind that while this herbicide is highly effective, it does take up to two weeks to see results. However, unlike fast-acting weed killers in which you may see a resurgence, the process in which Syngenta works ensures that crabgrass and other weeds will not return.

    Be sure to follow the directions closely for maximum effectiveness and take precautions to keep this product far from children and pets for their safety.

    • Highly effective herbicide
    • Kills crabgrass both before and after it emerges
    • Crabgrass and other weeds are fully eliminated
    • Concentrated mixture lasts a long time
    • Includes eye dropper for precise dilution
    • Initially expensive
    • Results take at least two weeks
    • Keep away from children and pets

    4. Scotts 49900 Halts Crabgrass Killer

    Scotts Lawn Care Plan

    When you want to get ahead of the weeds in the spring, we recommend applying Scotts halts crabgrass killer. All you need is one application to prevent the appearance of crabgrass all throughout the growing season. Apply it in fall to prevent certain winter weeds.

    For best results, apply in early spring, approximately two weeks before the ground is warm enough to germinate crabgrass seeds. This product works by eliminating the crabgrass before it emerges in your lawn. Keep in mind that this herbicide may not be effective on other types of weeds and it will not kill crabgrass that has already emerged.

    To use, empty the contents of this crabgrass killer into a spreader and apply evenly across your lawn. It maintains its effectiveness throughout poor weather conditions, including rain, snow, and freezing temperatures. One application is all that’s necessary to ensure results and allow at least two months between treatments.

    • Apply in the early spring
    • One application to see results
    • Prevents crabgrass from growing
    • Effective in the fall for winter weeds
    • Easily applied with a spreader
    • Effective in poor weather conditions
    • May not eliminate other weeds
    • Need to own or purchase a spreader for application
    • Will not kill emerged crabgrass

    5. PBI Gordon Over The Top Grass Herbicide

    PBI Gordon

    For crabgrass and other weeds have already emerged, PBI Gordon Over The Top Herbicide kills and stops the spreading. While expensive, the concentrated formula will last multiple applications.

    Over The Top has selective control of weeds, making it safe to use across your lawn and near plants that you wish to keep healthy. Even emerging ornamentals will not be adversely affected. However, you will need to take safety precautions around people and pets.

    We found that this herbicide’s effectiveness with crabgrass had mixed results. It seems better suited to control other grasses and weeds. Also, you’ll need to carefully follow instructions to ensure the best results.

    • Kills emerged crabgrass and other weeds
    • Concentrated formula lasts many applications
    • Selective weed control
    • Safe to use around healthy plants
    • Limited results with crabgrass
    • Keep away from children and pets
    • Expensive initial purchase

    6. BASF Drive XLR8 Herbicide

    BASF Drive XLR8

    Formulated to kill crabgrass, BASF Drive herbicide is designed to eliminate crabgrass from your lawn within one treatment. Similar to other concentrated products, this weed killer is higher in price but can cover a large area and will last for several applications.

    We found that you’ll most likely see results after a few days, with the crabgrass fully eliminated within a week. If you spray this herbicide over the expanse of your lawn, be prepared to see signs of stress and yellowing. However, we discovered that your lawn should recover rather quickly and without new emergence of crabgrass.

    To apply, mix 1 oz. of this herbicide with a gallon of water, and distribute it where you need it using a sprayer. Be sure to keep this herbicide away from children and pets. It takes less than an hour for this product to dry after application. Heavy rain right after applying may negatively impact its effectiveness.

    • Formulated to kill crabgrass
    • Concentrated formula lasts many applications
    • Results within a few days
    • Crabgrass fully eliminated in a week
    • Dries within 1 hour after application
    • Initial cost is expensive
    • Keep away from children and pets
    • Your lawn may show signs of stress
    • Heavy rain limits effectiveness

    7. Spectracide HG-95703 Lawn Weed Killer

    Spectracide Weed Stop For Lawns

    For an affordable, convenient solution to crabgrass and other weed control, you may want to consider Spectracide lawn weed killer. This product works fast to kill crabgrass at its roots, with visible results within five hours after application. It’s rainproof once it has set for three hours.

    To apply, simply attach your garden hose to the incorporated nozzle on the bottle. After turning on the water, point the nozzle and pull back the included switch to begin spraying. Water will automatically mix with the herbicide.

    Be sure to keep this product out of reach of children and pets. Also, it needs to be stored in a cool, dry location.

    We placed this product lower on our list for its limited effectiveness. While it does kill crabgrass, you may need to heavily apply this herbicide, and it may take several applications before you see results.

    • Affordable
    • Convenient to apply
    • Results within five hours
    • Rainproof after three hours
    • Limited effectiveness with crabgrass
    • May take heavy and repeated applications to achieve results
    • Keep away from children and pets
    • Must be stored in a cool, dry location

    8. GREEN LIGHT Wipe-Out Crabgrass Killer

    GREEN LIGHT 7462

    For an option that you can apply directly to your lawn, consider Green Light Wipe-Out crabgrass killer. This concentrated mix is more affordable than similar products and lasts for multiple spray applications.

    It’s important to note that you must add a surfactant to help this weed killer penetrate into the crabgrass. Without it, this herbicide beads up on the crabgrass’s leaves and rolls off into the soil, where it’s rendered ineffective. A surfactant can be purchased separately, or you can add a bit of liquid dish soap to the mix.

    This herbicide is formulated to kill crabgrass and over 250 varieties of weeds down to the roots. You’ll see results within a day or two, with the weeds fully decimated within a week. We found many examples of it working effectively on crabgrass while leaving the lawn in healthy condition. Although, you may need to reapply several times. Also, keep it away from children pets.

    • Safe to apply directly to your lawn
    • More affordable concentrated mix
    • Effectively kills crabgrass and 250 varieties of weeds
    • Surfactant required for effectiveness
    • Need to supply or purchase surfactant
    • May require several additional applications
    • Keep away from children and pets

    9. Primesource Quinclorac Liquid Crabgrass Killer

    Primesource Quinclorac 1.5L Select (Drive XLR8)

    Formulated to specifically kill crabgrass, Primesource Quuinclorac liquid crabgrass killer employs the latest research and technology. It also controls and eliminates a wide variety of weeds.

    This concentrated formula has a higher price, but it lasts. It can also be easily diluted in water and sprayed onto your lawn.

    While it works well on many types of lawns, we discovered that it may kill St. Augustine grass. Overall, we found that its effectiveness has mixed results. However, adding a surfactant may increase its level of success.

    Keep in mind that this herbicide contains strong chemicals that can be a hazard if mishandled. It’s wise to keep this herbicide out of reach of children and restrict your pet’s exposure to the product for many days after application.

    • Formulated to kill crabgrass
    • Works on a variety of weeds
    • Easily diluted in water
    • Not suitable for St. Augustine grass
    • May need to add a surfactant
    • Must be handled with care for your safety
    • Keep out of reach of children and pets
    • Keep pets off treated area

    10. Ortho Weed-B-Gon Plus Crabgrass Control

    Ortho Weed-B-Gon P

    Ortho Weed-B-Gon Plus crabgrass control is designed to kill crabgrass and over 200 varieties of weeds. It comes in concentrated form at an affordable price.

    This herbicide is designed to kill weeds that have emerged down to the root. It’s safe to apply with a sprayer over the entirety of your healthy, green lawn. It’s rainproof within an hour after application.

    You should see results after one application. However, we placed this product last for its limited effectiveness with crabgrass removal. A surfactant may help, as well applying it in optimal weather conditions.

    • Limited effectiveness with crabgrass
    • May need to add a surfactant
    • Not as effective in poor weather

    Final Verdict:

    Green Gobbler Weed & Grass Killer is our choice for the best overall crabgrass killer product available. It provides fast, effective results by killing weeds fully within 24 hours. Certified for organic use, it’s safe to use around people and pets, is glyphosate-free, and only contains natural ingredients. For your convenience, no dilution is required.

    Our selection for the best value goes to BioAdvanced 704140 All-in-One Crabgrass Killer. This herbicide is safe to apply to your full lawn. It’s formulated to eliminate crabgrass and over 200 more varieties of weeds. BioAdvanced begins working immediately, is rainproof after an hour, and can be used in most sprayers.

    Syngenta Tenacity Turf Herbicide is our premium choice. This highly effective herbicide kills crabgrass both before and after it emerges. The concentrated mixture lasts a long time. An eye dropper is included for precise dilution.

    We hope that our detailed reviews and easy-to-reference pros and cons lists have helped you find the best crabgrass killer for your lawn and garden. Crabgrass can be a stubborn weed to remove. With the right crabgrass killer, you can successfully eliminate this unattractive weed from your yard for good.

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