Best Weed Killer for Lawns That Is Guaranteed to Work Effectively

Having a lawn brings a feeling of happiness and comfort to every owner. You can grow flowers and vegetables or plant grass and make your lawn look like a park where you and your family members can rest after work.

However, fast-growing weeds can spoil your joy and change your lawn’s appearance shortly if you do not take proper care of this situation.

Therefore, to remove all the weeds from your lawn and prevent their further growth, it is vital to use the best weed killer for lawns. Weed killers are herbicides that help in fighting the weeds, so you don’t need to deal with them using your electric weed eater every now and then. Thus, it is a viable solution for dealing with invasive weeds that may damage your accurate grass and growing vegetation.

Is it an easy task to identify the most effective weed killer for lawns? Certainly not. The challenge is hard because almost every product that you come across promises the best results.

However, only a few of the solutions can live up to these expectations. Therefore, you need to research and study available reviews to settle on the most reliable herbicides. The process is especially time-consuming for those who haven’t used weed killers before.

Top Pick
Gordon’s SpeedZone Lawn Weed Killer,...
Ortho Weed B Gon Plus Crabgrass Control...
Preen 2463802 Garden Weed Preventer,...
Perfectly covers large-scale lawns.
Becomes watertight in one hour.
Can prevent weed growth for up to three months.
Top Pick
Gordon’s SpeedZone Lawn Weed Killer,...
Perfectly covers large-scale lawns.
Ortho Weed B Gon Plus Crabgrass Control...
Becomes watertight in one hour.
Preen 2463802 Garden Weed Preventer,...
Can prevent weed growth for up to three months.

As an expert in gardening, I have used a lot of herbicides in my work and for my lawn. Therefore, I know what products can deliver the best results and what items promise the effect they can’t provide. Since I have seen many people suffering from lack of expert recommendations, I have compiled a list of the best weed killer concentrate for lawns.

Below, I will discuss the herbicides’ characteristics, including the benefits and pitfalls that come with each item. I will also provide answers to the most frequently asked questions about lawn herbicides.

Top 10 Best Weed Killer for Lawns: Reviews

  1. Ortho Weed Killer B Gon Plus Crabgrass
  2. Preen 2464083
  3. RoundUp Weed Killer 5725070
  4. PBI/Gordon 652400 Speed Zone
  5. Green Gobbler Weed Killer
  6. Southern Ag 2,4-D Amine Weed Killer
  7. Scotts Halts Weed Preventer
  8. Compare-N-Save Concentrate Grass and Weed Killer
  9. Southern Non-Ionic Ag Surfactant

Keep reading to learn about some of the most reliable herbicides to get rid of the weeds in your garden or lawn. I have mentioned the items from the most recommended to the least advised ones, but each product has its pros and cons. So, I suggest reading the whole review to decide on the best product for your lawn.

1. Ortho Weed Killer B Gon Plus Crabgrass – A Top Rated Weed Killers

If you have been in search for a good weed killer for lawns that will work on many weed species, here is the ultimate solution to your gardening needs. Besides crabgrass, this product can wipe out other weeds like dandelions that are widespread in any soil type, mainly during spring. On the contrary, you are likely to find crabgrass sprawling across good-looking lawn grasses in summer and spring.

Ortho Weed B Gon Plus

Additionally, this Ortho weed killer also works against clovers, which grow mostly in moist areas. Therefore, if you have seen these kinds of weeds in your lawn, and you are confused about how to get rid of them, choose this Ortho product.

It is the roots that support weed’s growth by transporting nutrients across the plant. Thus, this weed killer works even on the roots of the weeds and destroys them entirely.

For the most desirable results, I recommend timing wild plants just as they are starting to grow because that is the most active growth phase. Since the product works on weeds only, the use of this Ortho weed killer will guarantee that your grass remains untouched. Be sure to check out the instructions for use beforehand to ensure that you apply the solution in the supposed way.

If you are concerned with the weeds during the wet seasons, you should definitely settle on this herbicide because it becomes watertight after one hour. Therefore, the rain will not wash the product out of your area, and a one-hour raining window is enough to deal with the weeds. This Ortho weed killer is the right choice if you are seeking the best value for the cost.


  • Becomes watertight in one hour
  • Works even on wild broadleaf plants
  • Destroys the roots that support weed growth


  • Unsuitable for large lawns

2. Preen 2464083 – The Best Weed Killer for Florida Lawns

In most cases, people start searching for such solutions when the weeds have already grown in their gardens. Thus, you may be looking for a pesticide that can help you to deal with the existing weeds. But it is also important to keep your lawn clear from weeds for an extended period.

For this purpose, the Preen company created a solution known as Preen 2464083. Preen weed killer is an effective product that allows preventing weeds from growing up to three months. Instead of letting the weeds grow over and over again, you can stop this process for an extended period. I believe that this prevention option sounds great.

Note that before applying this product, it is advisable to eliminate any weeds that have grown in your garden. The Preen 2464083 won’t help you to remove already grown wild plants. Instead, this product prevents new ones from growing. Therefore, it is necessary to clear your garden before using this pesticide.

The product comes in a granular form, and it is packed in a plastic bag. It differs from liquid herbicides that come in bottles with a tight seal to prevent spillage of the content. When applying this weed killer on your lawn, use the handy scoop. It is provided with the Preen 2464083 for an even distribution of the chemical.

Many people sprinkle this product with their hands, but I strongly recommend you not to do it because the solution may harm your palms. Also, if you take the weed killer with your hands and then scratch your eyes or touch another body part, this may be dangerous, too.

Therefore, it is great to know that the Preen company has provided a handy shaker scoop to protect you and distribute the product evenly on all parts of the garden. By shaking it on the go, you will be able to spread the right amount of granules.

The company has ensured that you get value for every penny you spend. Thus, it has made a package of 31.3 pounds. This is enough for use on a five thousand square feet garden. If you have a smaller lawn, then this weed killer will last you a few seasons. Since this Preen 2464083 solution prevents weed from growing for up to three months, I find this product highly effective and economical.


  • Can prevent weed growth for up to three months
  • Suitable for farms with vegetables and flowers
  • Sufficient for lawns of up to 500 sq. ft


  • Not useful for killing existing weeds because it is a preventive product

3. RoundUp Weed Killer 5725070 – The Extended Control Grass Killer

RoundUp 5725070 Extended Control Grass Killer

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This Roundup weed and grass killer is a reliable product because it acts considerably fast, and the results are visible within three hours only. Besides that, no new wild plants will grow in your lawn for about four months after using this product. RoundUp Weed Killer 5725070 inhibits the growth of the roots that support the weeds so that these wild plants can’t grow again quickly.

I would also vouch for this weed killer because it is possible to spot the first positive changes almost immediately after use, in particular, within ten minutes. Therefore, even if it is raining all day and the rain stops for at least ten minutes, you can use this time to apply this pesticide. Still, you can be sure of its effectiveness regardless of how hard it rains afterward.

If you like multipurpose products, then this herbicide is a perfect solution for you. Besides inhibiting weed growth on your lawn, it can also be useful in the elimination of the wild plants present within other areas in your compound, such as fences and walkways. You can also use this RoundUp Weed Killer 5725070 to ensure that your garden flourishes being free of stubborn weeds.

This product is also a great choice if you have experienced difficulties with mixing up other weed killer solutions. You can easily apply this weed killer without needing to mix it with other components of water, and also you measure your sprayer on the go. All you need to do is to connect the sprayer to the bottle and start applying the solution.

Another reason I like Roundup Weed Killer 5725070 is that it prevents the growth of weeds in the next four months after application. Therefore, you can apply it on the land before planting crops that take three months to grow and be harvested. During the season, you will not be bothered by weeds sprouting amongst your vegetables. Instead, you will have time to concentrate on taking care of the plants.


  • Works within ten minutes after application
  • Suitable against wild plants across different areas of your lawn
  • Guarantees the absence of weeds for up to four months


  • Requires a lot of precautions when handling

4. PBI/Gordon 652400 Speed Zone – A Famous Gordon Weed Killer

For how long you are ready to wait for herbicides to work is a consideration you should make before getting one. A fast-acting product will free your garden from weeds shortly. However, such speedy weed killers often end up destroying your grass as well.

Therefore, if you are looking for the best rated weed killers spray for lawns that has no such effects on your grass, this Gordon 652400 weed killer is what you need. It only works the weeds’ leaves, meaning that it does not harm other plants or grass. This Gordon’s SpeedZone weed killer will leave you with a desirable lawn cleaned from weeds quickly. Within a few hours, you will start noticing the changes.

Also, if you have a significantly large lawn, you should settle on this herbicide as it can cover between 14,000 to 18,000 square feet of property. Thus, just one bottle of this product is sufficient for covering a large-scale lawn.

Moreover, the bottle weighs 1 pound only. Therefore, if you want to apply the product to different areas of your garden, you won’t get tired carrying this solution around.

An additional advantage of settling on the PBI Gordon Speed Zone weed killer is that you will no longer be concerned or worried about resistant weeds. This solution is made to exterminate troublesome weed groups that can grow even in turfgrass. Therefore, if you are seeking an herbicide that you can use on the large-scale lawn with the most robust weeds, then look no further than this Gordon weed killer.


  • Perfectly covers large-scale lawns
  • Does no harm to the lawn grass
  • A fast-acting product


  • Works in cool weather only

5. Green Gobbler Weed Killer – A Great Organic Product

Green Gobbler solution is a great choice for every person who prefers reliability over other factors when buying a product. This solution is reliable because it is extremely efficient in killing weeds. Also, you can apply it for removing grass from the areas where it is unwanted.

  • Green Gobbler Weed Killer
  • Before Green Gobbler Weed Killer
  • after Green Gobbler Weed Killer

What I like about this Green Gobbler weed killer is that it is highly efficient and fast-acting. The solution can kill weeds within twenty-four hours of applying it on your lawn. Moreover, while other pesticides are meant for use on a few spots only, this one can be applied to any area. For example, you can use it on your parking lots, driveways, pavements, and flower beds.

If you are wondering about the toxicity levels of this weed killer, the good news is that it is an organic weed killer for lawns. The solution is made from corn, so it is much safer compared to other chemicals. The distilled corn produces ethanol, which forms this product.

The manufacturer ensures that this Green Gobbler weed remover does not contain harmful elements. Also, the product is certified by OMRI as a safe, efficient weed killer made of organic ingredients.

With vinegar as one of the main components, the solution is effective for killing numerous types of weeds, such as dandelions, crabgrass, and thistles. The product comes in a plastic bottle that weighs 1.9 pounds, and it is fitted with a sprayer. The sprayer helps in applying the weed killer solution to the affected areas in your garden or the sidewalk.


  • Affordable
  • Comes in a lightweight plastic can
  • An organic weed killer
  • Can be used on a lawn of any size


  • If applied on flowers or vegetation, it can kill them, too

6. Southern Ag 2,4-D Amine Weed Killer – Powerful and Economical Solution

Southern weed killer for lawn is another pesticide that can help you to minimize the possibility of weeds re-growing in your lawn. Among the things that people love about this product is that it is very economical. Four pints of the chemical are enough to cover an acre of land. Therefore, if you are planning to use such a solution for your lawn only, it will last for more than a year.

This is another multipurpose product. For example, you can use it on driveways, fences, pastures, and other areas. This shows that the Southern Ag 2,4-D Amine weed killer is safe for use even in areas where domestic animals graze.

Since it is probably the best weed killer for lawns, this product can help you to get rid of even broadleaf weeds. Everyone knows how stubborn these weeds are, but with this pesticide, you can remove such wild plants easily.

Moreover, the Southern Ag solution does not require a complicated procedure of application. All you need to do is to put three tablespoons of the chemical in five water gallons. Then, mix the solution thoroughly, and you are good to go. For optimal results, use with a sprayer that has medium to low pressure. When it comes to covering a large-scale area, I recommend also add a surfactant to the solution such as dishwashing soap.

The Southern Ag 2,4-D Amine weed killer comes in a plastic bottle that weighs 1.9 pounds only. However, with the three tablespoons you need to use for one application, this product will last you for many months and deliver great results.


  • Kills even broadleaf weeds
  • Packed in a durable plastic container
  • The bottle is very light
  • Can be used several times on a large lawn


  • It may take a week to deliver the desired effect

7. Scotts Halts Weed Preventer – Best Weed Killer for North Texas Lawns

If you have been looking for the best weed killer for southern lawns, you may want to give this product a try. The reason is the great functionality of this Scott Halts weed preventing solution that does not depend on the prevailing weather conditions. Therefore, you can be confident of the results when using the product in wet or even snowy weather.

If you rarely have time for removing wild plants from your lawn, then this Scotts weed killer is a perfect solution. Spray it once in a season on your lawn, and the product is guaranteed to solve your weed concerns.

I want to mention that many people recommend this product when the spring season is kicking in. This will help you to enjoy a full season without any weeds in your lawn. Scott Halts weed preventer also controls the growth of different species of wild plants, so it comes as a good option for handling the seasonal weeds.

Since this weed killer is designed to work all season long, don’t use it more than twice in a year to avoid harming your grass or seasonal crops. Besides, it is advisable to take at least a two-month break before re-applying the solution. These precautions should prove to you how strong this herbicide is.

You should keep in mind the size of your lawn before purchasing this product. The quantity in the package can adequately cover a 5,000 square foot area. Therefore, if you have a more extensive lawn, you should consider buying a few packages at once or opt for the product that can cover large-scale land pieces.


  • Requires only one application per season
  • Its performance doesn’t depend on weather conditions
  • Can be used against most weeds


  • Won’t cover large lawns

8. Compare-N-Save Concentrate Grass and Weed Killer – A Top Product

The Compare-n-Save grass and weed killer is an all-purpose product. It is not only designed to work against wild plants but also unwanted grass. Therefore, if there is a lot of grass around your property, for example, on a walkway or driveway, you can use this herbicide to eliminate the weeds neatly and achieve a good-looking compound.

Glyphosate is the main ingredient of this chemical. It kills bothersome wild plants successfully by hindering some plant enzymes that are essential for the weed’s growth. Also, it takes a considerably short duration before you start noticing the effects of this chemical after application. Usually, the results take between two to four days to get visible.

The Compare-n-Save weed killer is also effective regardless of the weather season. The first results will be noticed within a few days, no matter if it is hot or cold outside.

An additional impressive feature of this weed killer is the area it can cover. It is an extremely concentrated solution, which you must dilute before applying it to your lawn. The Compare-n-Save product can result in 85 gallons of the herbicide. This is sufficient to cover over 25,000 square feet of property. In comparison to the other herbicides that are capable of covering large properties, it is relatively efficient.


  • Covers a large area, so it is ideal for large lawns
  • A highly concentrated solution
  • Can be used in any season


  • Requires a lot of caution during the application
  • Can be ineffective when applied too concentrated
  • Dangerous for pets! Be careful!

9. Southern Non-Ionic Ag Surfactant – A Famous Southern Ag Weed Killer

This non-ionic surfactant is another weed killer produced by Southern Ag. Note that this is a surfactant and not an herbicide. It is meant to be used alongside an herbicide of your choice. For example, you may use it with the Southern Ag weed killer.

It is an eighty percent non-ionic agent that is used for increasing wetting so that an herbicide can be more efficient compared to if used alone. It also enables herbicides to be distributed evenly on the areas with weeds. Therefore, this surfactant increases the efficiency of the selected herbicide in two ways that include improved wetting due to non-ionic composition and enhanced equal distribution.

The Southern non-ionic composition can be used with top weed killer for lawns such as Brush, Trimec, and Atrazine. When considering any similar weed killer for lawns, remember to mix a teaspoon of the surfactant with each gallon of water. However, with RoundUp and MSMA, you should mix a tablespoon of the non-ionic compound with every gallon of water.

It is advisable to check if the herbicide you are using has recommendations for adding a surfactant to it. Not all of the weed killers may need it because some manufacturers have already included such components in the solution. I also want to note that this Southern Non-Ionic Ag Surfactant weighs 1.2 pounds and, like most of the similar products, is sealed in a plastic bottle for safety purposes.


  • Allows the uniform distribution of herbicides when sprayed on leaves
  • Lightweight formula
  • Non-ionic substance
  • Economical because only a tablespoon is needed for a water gallon


  • Should be used in combination with water and herbicides, not a stand-alone product

10. RM43 43-Percent Glyphosate Plus – Most Effective Weed Killer for Lawns

RM43 weed killer is one of the most effective products when it comes to removing weeds from a lawn. If you want to get rid of weeds and prevent their re-growth in your garden, take a closer look at this product.

This herbicide should be amongst your top picks if you want to eliminate any vegetation growing in your garden entirely. Once sprayed, it can remain effective for a period extending to one year. To apply the solution, get suited up with the protective gear and spray the RM43 product all over the wild plants.

As the safest weed killer for lawns, RM43 dries weeds out and prevents their growth for a longer time compared to similar products on the market.

The RM43 weed killer is securely packed in a plastic bottle like most herbicides so that it won’t harm you or your plants. Another amazing thing about this product is that it weighs ten pounds, yet it can be used for about 17,297 square feet of land. This efficiency has, in turn, earned the premium tag.


  • Efficiently eliminates weed
  • Safe to apply even around a farmhouse
  • Can control weed growth for one year


  • This is a premium product, thus, expensive

Frequently Asked Questions about Weed Killers for Lawns

Green Gobbler

There is always much to take into consideration when it comes to buying a weed killer. For starters, you have to understand which one is suitable for what needs.

In this respect, you may be having various questions in mind. In the section that follows, I will respond to the most popular questions on weed removers and other related queries.

How Long Does It Take for Lawn Weed Killer to Work?

Every herbicide has its time of work. You may find that some solutions provide results for as little as one to three days after application, while others need even a week before the effect becomes visible.

Therefore, take your time to read through the manufacturer’s instructions to find out the time the product takes to produce results. Thus, if you are looking for a natural weed killer for lawns that provides immediate results, I recommend reading the information provided by the manufacturer and settle on the best option.

Also, it is important to note that some herbicides work by killing the plants starting from the tips, but others work on the roots firstly. But in the end, all of them work efficiently. Therefore, mind this aspect when you consider the best weed killer for lawn to buy.

What Weed Killer to Use in the Fall for Your Lawn?

Have you ever wondered what is the best weed killer for lawns during the fall season? Most of the herbicides mentioned above are not affected by the different seasons of a year. For example, Scotts weed killer for lawns and Green Gobbler product are guaranteed to work all year through.

If the manufacturer has not indicated the seasons when their herbicides work best, it is important to seek further clarification on the matter and read reviews. Before spending your money on an herbicide, get all the relevant information about its specifics.

How Long Does It Take for RoundUp to Work?

Many people decide to use the RoundUp product as it is the best broadleaf weed killer for lawns. Its efficiency caused much of the hype around this product. The herbicide has numerous variations and got significant formula improvements since the 70s when it was first produced.

You can tell these differences even by taking a look at the efficiency of the RoundUp solution. For example, nowadays, it takes as little as a day for you to notice the impact of the herbicide, especially during the hot days.

Which Lawn Fertilizer/Weed Killer is Safe for Dogs?

You definitely need the best organic weed killer for lawns if you own a dog. Green Gobbler is among the safest organic herbicides for use in a household with dogs and cats. Green Gobbler is made free of chemical elements that could be poisonous to your pets. Moreover, it contains vinegar that is safe for both humans and pets, although the content is a bit stronger than in the one for domestic purposes.

However, there are some other alternatives to this organic weed killer, and it is possible to find a working solution that will be safe for your dog. Before purchasing a product, make sure to analyze the ingredients that make up an herbicide or request the relevant information from the seller.

How to Recover Lawn from Weed Killer?

Sometimes, the best liquid weed killer for lawns may end up killing your grass and other important plants. When such a situation occurs, follow these steps to recover the lawn:

  • Clean up the lawn

This is basically the first stage. You need to get the dead grass off from the one that has some signs of green. This can be accomplished by basically uprooting all the grass bearing a brown color since it can hardly be restored. However, be careful not to uproot grass with only patches of brown. For such plants, there is still hope for restoration.

  • Plant new seeds in the areas where you have uprooted dead grass

The next step is to plant new grass seeds. Remember to put some soil over the spread seeds to protect them from birds. After this, ensure that you water the seeds at least twice a day. The constant watering will make them grow at a faster rate.

Note that when replanting seeds, you should avoid using fertilizer. Since the chemical contains nitrogen, it may end up killing the grass instead of promoting its growth.

How Long Does It Take for Bayer Weed Killer to Work My Lawn?

Bayer advanced weed killer for lawns review indicates that herbicides take varying periods to be effective. In the dry periods, lawns may take longer to respond to the weed removing solutions. However, the results can be improved by watering the garden a day before spraying the chemical. Also, you can continue watering the lawn a day after to maximize the outcome.

I want to warn you that you can’t use herbicides on your lawn if the grass has not reached at least two inches. In such a case, the weed killer may cause such damages to your grass that outdo the benefits.

Closing Remarks – Shopping for a Reliable Weed Killer

Best Weed Killer for Lawns

Finding an efficient weed killer is every gardener’s dream. Everyone wants to have a well-maintained, beautiful lawn. For a seasoned gardener like me, it can be an easy time identifying the right herbicide for my gardening needs. However, for most people, this may be a challenge because every product you come by promises the best results, yet only a few can actually meet your expectations.

Therefore, I hope that these best weed killer for lawns reviews of ten time-proven products helped you to learn more about the effective herbicides for your lawn. Some products may come in granules, while others are liquid. The encouraging fact is that efficiency doesn’t depend on the form of a solution.

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Moreover, each of the products comes with detailed directions of usage.
For example, Ortho Weed B Gon Weed Killer works by destroying the weeds right from their roots. Based on its composition, the solution can safely be used in areas where grass and vegetables also grow. Unlike other herbicides, it will get rid of the weeds without any harm to your plants.

It is important to remember that other weed killers work by getting rid of everything that they come into contact with, for example, the RM43 solution. Although it is effective for removing weeds, you need to be very careful when applying the product onto your lawn. On the bright side, you can use it for perfect area cleaning on locations such as sidewalks or parking lots.

When purchasing a weed killer, it is essential to check out the list of components. You can obtain a lot of information by understanding the composition of the selected solution. For example, does it contain dangerous chemicals? Is it safe to use in homesteads with pets?

Ortho weed gone

Another important detail to remember is that some herbicides require adding a surfactant to produce the desired outcome. This compound helps in distributing the chemical evenly. It also increases the solution’s ability to penetrate deeper into the weeds. Dishwashing soap can be utilized as a viable homemade surfactant alternative. For better results, Southern Ag works more efficiently, especially on large-scale lawns.

The amount of time the best granular weed killer for lawns takes to work depends on the herbicide’s formulas and brands. Some may work within a day, while others may take a week or two to produce the desired outcomes. Thus, I profoundly recommend checking the elements that make up the herbicide and the directions of usage provided by the manufacturer.

Is there any other herbicide that you would like to add on the list? How efficient is the chemical that you are currently using? Have you used any of the herbicides mentioned in this review?

Share your experience with me in the comments below.

Sean Chapman
Sean Chapman

“A good tool stays with you for many years and choosing carefully ensures the job is done right, your work is neat, and the tool is always a pleasure to use”

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