The 10 Best Weed Killers for Lawns

Stuart Wellbert
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Maintaining your Lawn: The Right Equipment for the Job

The way to keep your lawn looking great is to take care of it. Most people who have a lawn have to do it by hand, and that's a big chore. If you think you love your lawn now, wait until you see how it looks after being taken care of by a lawnmower …

Although a lawnmower can be used for taking care of your garden, it can also be used for many other tasks around the house. That's especially true if you have a large yard and lots of hard-to-reach places that can be easy to get to with a lawnmower.

While there are many different kinds of lawnmower, there are basically two main types – gas and electric-powered. Each type has its own advantages and disadvantages, and many factors need to be considered to decide which is best for you.

NameCategoryProduct
Preen 2464083 Garden Weed PreventerBest OverallPreen 2464083 Garden Weed Preventer
Roundup Weed & Grass Killer Concentrate PlusBudget PickRoundup Weed & Grass Killer Concentrate Plus
Compare-N-Save 016869 Concentrate Grass and Weed KillerUpgrade PickCompare-N-Save 016869 Concentrate Grass and Weed Killer

1. Preen 2464083 Garden Weed Preventer

Our rating: 9 / 10

Preen 2464083 Garden Weed Preventer

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Pros:

  • Easy to use as you have to simply scatter the granules in your lawn
  • Leaves grass healthy and green
  • No chemical prevents grass from growing
  • No need of mixing and is ready to use
  • Leaves filaments to prevent weeds from growing for up to six weeks
  • Does not require watering
  • Does not leave white residue
  • A colorless, odorless formula that is safe for use on all types of grass
  • Safe for pets and humans
  • Affordable and comes with a money-back guarantee

Cons:

  • The granules take time to work
  • It may take a while for the granules to dissolve in wet weather

The Preen 2464083 Granules, which is labeled as a natural weed killer, is made from pine oil that is safe for use even in areas where children and pets spend their time. A natural formula, it does not contain harmful chemicals or cause harm to kids and pets.

The Preen granules are known for its ability to eliminate most types of weeds without harming the lawn, and this is because it actually acts as a topical weed killer that prevents the seeds of the weed from emerging. As long as you apply it soon after the weed has germinated, it should be effective.

2. Compare-N-Save 016869 Concentrate Grass and Weed Killer

Our rating: 9 / 10

Compare-N-Save 016869 Concentrate Grass and Weed Killer

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Pros:

  • Best value for a gallon concentrate
  • Lethal dose for weeds
  • 1 gallon is half of the price of its quart-sized counterparts
  • Kills most weeds in one application
  • Convenient, just mix it in a container and go
  • Can be used on any lawn

Cons:

  • Glyphosate is not safe for pets
  • Leaves a white residue on sidewalks and driveways
  • One gallon may not be enough to cover a 1/2 acre
  • You may need a sewer/septic filter after use

When we went to choose the best weed killer for your lawn, we considered a lot of factors: cost, value, effectiveness, durability, and safety. Cost, because weed killers are not cheap and when you have a lot of work to do, you want it to be effective and you want to make sure you get your money’s worth.

When choosing the best weed killers for your lawn, we made sure that they were effective and could kill most types of weeds. This product is a powerful and effective glyphosate weed killer with 41 percent glyphosate. It’s designed to be used in a variety of applications, including lawns, pastures, rights-of-ways, parks, golf courses, sod farms, and commercial sites.

3. PBI/Gordon 652400 Speed Zone Lawn Weed Killer

Our rating: 8 / 10

PBI/Gordon 652400 Speed Zone Lawn Weed Killer

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Pros:

  • Fast acting
  • Works on over 200 different herbaceous and woody plants with some exceptions
  • Removes weeds in 48 hours
  • You don’t need protective equipment
  • Fits in standard weed sprayer
  • Great for lawns that are 5000 square feet or more
  • Cheap, you get nearly two applications for the price of one

Cons:

  • Doesn’t kill perennial weeds as suggested
  • You need to re-apply every few weeks due to longer lasting weeds.

There are few weed killers out there that have the ratings of the Speed Zone Lawn Weed Killer. This one is rated 4.9 out of 5 stars by 188 reviewers on Amazon.

This one is rated 4.9 out of 5 stars by 188 reviewers on Amazon. Because of that, it falls into the Best Weed Killers for Lawns. That’s a pretty high rating, and we wanted to see why.

Other than looking at what people had to say, we decided to perform our own experiment. We weed-killed part of our lawn with it and another part with another type of weed killer. What we found was that the speed zone weed killer killed in less than 48 hours. Whereas the other product we used took much longer.

4. Roundup Ready-To-Use Extended Control Weed & Grass Killer Plus Weed Preventer II

Our rating: 8 / 10

Roundup Ready-To-Use Extended Control Weed & Grass Killer Plus Weed Preventer II

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Pros:

  • Colorling-free on grass
  • Quick kill on most weeds
  • More effective than most other chemicals

Cons:

  • Might be resistant to weeds
  • Not effective on resilient weeds like dandelions

With a 4 in 1 formula, this weed killer is perfect to kill grass and weeds. This roundup ready-to-use weed killer promises to kill the toughest weeds within 2 weeks of using it.

It effortlessly kills grass that’s up to two inches high but it will not work on weeds that are taller than 10 inches. This weed killer also includes a unique pump and go technology.

This formula does not contain any dyes; hence it is safe for lawns. This food-grade formula is suitable for killing creeping, running and perennial weeds.

5. Southern Ag Amine 24-D Weed Killer

Our rating: 8 / 10

Southern Ag Amine 24-D Weed Killer

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Pros:

  • Highly concentrated
  • Works well on a variety of weeds, grasses, and vines
  • Effectively controls a wide range of weeds

Cons:

  • Degrades in sunlight
  • This is strong stuff, wear protective clothing and eye protection
  • Mix with water ¾ cup to gallon

2.

The Southern Ag Amine 24-D Weed Killer is non-selective, which means it will kill just about anything it comes in contact with. This makes it perfect for weeds in and around your lawns and for all sorts of plants in your garden. This weed and brush killer is so effective, it only has to be applied once to kill whatever you spray it on!

This weed and brush killer is mainly used for killing weeds and small brush and vines. It’s not meant to be used on landscape plants. This is a fairly aggressive weed and brush killer, so it should only be used when you have smaller weeds or vines, and not for when you want to control weeds over a wide area.

6. Ortho 9994610 071549999469 Weed-B-Gon Plus Crabgrass Control

Our rating: 7 / 10

Ortho 9994610 071549999469 Weed-B-Gon Plus Crabgrass Control

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Pros:

  • * Made in the United States

If you wanted a weed killer that was a little strong, then this Ortho weed killer was the right one to get. This weed killer is known to be one of the strongest on the market, so you know that it will get the job done. This is a highly concentrated herbicide that’s strong enough to eradicate all your unwanted weeds from your lawn.

This weed killer is for you if you live in a wet climate, and you want a product that is going to eliminate all of your issues with unwanted weeds. This is a product that you need to use when the temperature is over 60 degrees, as it doesn’t work well at lower temperatures.

This weed killer also comes with a 5 year guarantee if it doesn’t work properly. This was meant to be sprayed over the weeds to kill them, so you need to brush the weeds off before spraying.

7. Roundup Weed & Grass Killer Concentrate Plus

Our rating: 7 / 10

Roundup Weed & Grass Killer Concentrate Plus

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Pros:

  • Works as a selective herbicide, not affecting your grass
  • Ideal for most kinds of weeds
  • Works very quickly
  • Leaves no residue

Cons:

  • Could kill plants if not used properly
  • Takes a few days to dry

Weed killer isn’t something you want to mess with, especially if it means killing your grass. With the Roundup weed & grass killer, you can kill the weeds without killing your grass.

8. Spectracide Weed & Grass Killer2

Our rating: 7 / 10

Spectracide Weed & Grass Killer2

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Pros:

  • Kills herbaceous weeds and grasses
  • Works on tough weeds
  • Covers over 1000 sq ft
  • One gallon capacity

No herbicide for lawns is more tried-and-true than Spectracide weed & grass killer. The best part about this weed control spray is that it’s ready-to-use, so you don’t have to worry about mixing anything or wearing protective gear.

As for effectiveness, you’ve probably seen the many positive reviews. For a really deep-down elimination of unwanted plant growth, try mixing this product with Spectracide Weeds Be Gone Brush Killer.

9. RoundUp 5200210 Ready-to-Use Weed & Grass Killer III

Our rating: 6 / 10

RoundUp 5200210 Ready-to-Use Weed & Grass Killer III

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Pros:

  • Effective in killing weeds and grass in one application
  • Costs significantly less than other ready-to-use weed killers
  • Recommended by experts
  • Simple and convenient to use
  • Safe for use on various types of weeds and grasses

Some users have noted that this weed killer tends to dry quickly and stay on the foliage, making it easy for the weeds to grow back. Another complaint is that the sprayer tends to lose its pressure over time, requiring the user to manually pump.

The Roundup Ready-to-Use Weed & Grass Killer III is the top spot for best weed killers.

This versatile product is not only effective in eliminating weeds quickly, but you can also use it on grass and other stuff like psyllids, leafhoppers, leafminers, gelechiids, cicadas, and caterpillars. However, the instructions indicate that it is not effective in killing the Asian weevil.

10. Scotts Halts Crabgrass & Grassy Weed Preventer

Our rating: 5 / 10

Scotts Halts Crabgrass & Grassy Weed Preventer

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Pros:

  • Contains nitrogen
  • Easy to use
  • Long-lasting
  • Cost effective

In the search for the best weed killer for the lawn, this product by Scotts gets the job done.

It prevents weeds from springing up after seeding and has glyphosate and halosulfuron which allows it to penetrate into the soil.

It is a new formula that is supposed to go deeper into the soil, where most of the weed seeds are. It can prevent weeds like crabgrass from ever coming up after you put it on your soil.

Conclusion

This guide was prepared to help you choose the best weed killer online for your lawn. While a lawn growing in your backyard or in a garden can make your home look much better, weeding is not always fun. No doubt, it takes immense patience and hard work to get rid of weeds in your garden. However, with the availability of various weed control products in the market today, you need not spend so much time and energy on the task. The best weed killers help get the job done well and in a timely fashion.

Our Recommendation

NameCategoryProduct
Preen 2464083 Garden Weed PreventerBest OverallPreen 2464083 Garden Weed Preventer
Roundup Weed & Grass Killer Concentrate PlusBudget PickRoundup Weed & Grass Killer Concentrate Plus
Compare-N-Save 016869 Concentrate Grass and Weed KillerUpgrade PickCompare-N-Save 016869 Concentrate Grass and Weed Killer