Best commercial weed killer

Best Commercial Weed Killer: Top 7 Reviewed & Compared

Managing your precious lawns and gardens can be tough, especially when weeds come to town. You want to be a responsible caretaker, but you aren’t sure what to buy – do you go hard and use a strong chemical weed killer like RoundUp? Or do you try your luck with an organic, natural herbicide instead?

It’s not an easy decision! More and more people and companies are already moving away from chemical weed killers, and so it’s time to decide what’s best for you.

There are plenty of great products available for homeowners and landscapers who are looking to banish weeds for good! Lucky for you, we’ve filtered through the noise and compiled this list of the best commercial weed killers on the market. Of course, what you choose will depend entirely on your specific needs.

Read on to find seven highly recommended commercial weed killers, followed by a comprehensive buyer’s guide!

Our Winner After 40+ Hours Of Research

Compare-N-Save Concentrate Grass and Weed Killer

Our Rating

Top 7 Commercial Weed Killers Review

From powerful chemical weed killers to organic herbicides, from root killers to spot cleaners, we’ve compiled a list of the best products out there for managing your home flora.

Compare-N-Save Concentrate Grass and Weed Killer

When it comes to post-emergent weed killers, Compare-N-Save is one of the most powerful options on the market today. It’s a versatile product; you can use it on driveways and walkways to keep them clear of grass, by fences to keep everything tidy, and even around flower beds, shrubs, and trees without affecting the plants themselves.

Compare-N-Save Concentrate Grass and Weed Killer

Compare-N-Save is made with 41% glyphosate which is absorbed through the foliage and kills the roots of the plant. According to reviews, this product is extremely powerful, providing visible results in less than five days. It also comes in a convenient concentrate form. A gallon of Compare-N-Save can make as much as 85 gallons of spray. One user said they managed to make 300 gallons of their own mix, making their gallon bottle last for nearly two years!

All you need to do is mix 1.5 ounces or three tablespoons of concentrate with 1 gallon of water to get you a working solution. 1 gallon of mix should be enough to cover 300 square feet of land. But that’s just the recommended amount. You can measure out your dosage to be stronger or weaker depending on the weeds you’re trying to kill and the surrounding plants you’re trying to protect.

For best results, the weed killer should be applied on warm days with an ambient temperature higher than 60 degrees fahrenheit. The manufacturer recommends spraying on days where there is no chance of rain, but if you must deal with it, the product is designed to be rainproof after only two hours, so you don’t need to worry too much.

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There are a few things to take note of when using Compare-N-Save. There are some reports online of the product not being as effective as advertised. While we can’t say for sure since they’re mostly online reviews, there are some messages indicating it may not be as powerful as they say it is. Others also say you should be careful while using it since it kills all other plants it comes into contact with. Be careful about how you apply this weed killer.

Despite the press, Compare-N-Save has proven to be a favorite, given its value for money and weed-killing strength. If you’re looking for a weed killer that’s designed to get the job done, be sure to give Compare-N-Save a look. You can purchase it in a 1-gallon, 32-ounce, and 16-ounce bottle depending on your weed situation and the size of your lawn or garden.

Doctor Kirchner Natural Weed Killer

Unlike more than a few products on our list, Doctor Kirchner is made with all-natural ingredients, and it is meant to be safe to use around pets and other wildlife. To top it all off, it’s surprisingly effective! Doctor Kirchner still has the power to stand with the strongest chemical-based weed killers out there.

Doctor Kirchner Natural Weed Killer

So what’s it made of? Surprisingly enough, its main component is seawater. That’s right, if you take a look at the active ingredients, what you have is sodium chloride. Salt. Added to that are vinegar and soap. The whole thing is pre-mixed for you and requires no preparation to use. This makes it not as freakishly long-lasting as the concentrates, but you can still get some good mileage off your purchase.

Doctor Kirchner is non-selective, meaning it will kill whatever you spray it on. Take note of this and be cautious about where you’re spraying. Like Compare-N-Save, it is a contact weed killer, meaning it attacks the plants it comes into direct contact with. And like the previous entrant, it is a post-emergent weed killer, meaning it is meant to be used on plants that have already grown and are present in your lawn or garden.

Given its all-natural nature, it does not contain any harmful chemicals like glyphosate, and will not harm any animals who may consume it. Even without powerful chemicals, Doctor Kirchner manages to get the job done. Visible results can be seen within an hour, while most sprayed weeds will wither overnight. It also becomes rainproof within 30 minutes to an hour.

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As a non-selective weed killer, it will kill all types of grasses and weeds you spray it on. It’s a good product to use for places you want plants eliminated from completely, like pool decks, hardscape, and mulched areas. It makes a fantastic product for spot clearing, and you can use it without reservation thanks to its non-toxic nature.

If you’re looking for a powerful weed killer that’s safe for the environment, then you will probably love Doctor Kirchner. Say goodbye to sketchy chemicals and hello to effective organic products.

Green Gobbler Vinegar Weed & Grass Killer

Adding on to the list of natural and organic weed killers, Green Gobbler is a vinegar-based herbicide that will do little damage to the surrounding soil, pets, fish, birds, and whatever else is living in the vicinity of your lawn or garden. Because of that, you can go ahead and use it in any commercial, residential, agricultural, or industrial applications! It’s been a longtime favorite for plenty of homeowners and landscapers looking for a natural solution to weeds and unwanted growth.

Green Gobbler Vinegar Weed & Grass Killer

As mentioned earlier, Green Gobbler’s active ingredient is vinegar, or to be more accurate, Acetic acid. It exists in a 20% solution, and it can smell as strong as the chemical weed killers on this list. Don’t worry, the strong vinegar smell doesn’t take away from this product’s safety whatsoever. Just like Doctor Kirchner, this stuff is pre-mixed and ready-to-go right after you purchase it. No need to deal with measurements and the like. Just set it up and spray away.

Like with Doctor Kirchner, Green Gobbler is a non-selective herbicide, meaning it will start working its magic on anything you put it on. Be sure to avoid spraying this stuff on any plants you’re particularly fond of. It’s great for areas you want to be devoid of plant growth, such as pavers, mulched flower beds, decks and patios, and pool areas.

If you’re concerned about safety, then you’re in luck. Green Gobbler is OMRI-listed, meaning it’s certified organic. The vinegar used in Green Gobbler is made by the company itself and is a corn-derived formula that is four times stronger than the stuff in your kitchen. This vinegar really packs a punch. As it is organic, it contains no harmful chemicals and degrades safely in the soil. It works on any perennial or annual weeds you want to deal with.

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According to some research, Green Gobbler does have issues dealing with Dandelions. In addition, some reviewers note that it isn’t as effective as other herbicides, even other all-natural ones. While it may not be the strongest product out there, it does kill most plants with little issue.

With chemicals becoming a more worrying problem in today’s environmental arena, it might be best to really start looking at natural alternatives to the chemical products we’ve grown to know. Products like Green Gobbler have shown that you don’t need to rely on harmful chemicals to get yourself a tidy lawn.

Roundup Weed and Grass Killer Super Concentrate

For better or worse, Roundup is one of the most well-known names in herbicides. Its powerful formulation lets it handle any weed you could imagine. Even the toughest weeds will have a hard time standing up to this product. Even so, it is still usable around beneficial plants and on driveways and sidewalks. It isn’t just strong, it’s accurate.

Roundup Weed and Grass Killer Super Concentrate

Roundup Super Concentrate is the “standard” form of Roundup weed killer. Its main active ingredient is glyphosate, like Compare-N-Save. This is NOT an organic weed killer, so be careful when and how you use it. It is also non-selective, meaning it will kill anything it comes into contact with. It’s recommended you use non-selective herbicides when treating weeds and gardens and landscape beds, or cleaning up the edges of where a lawn meets a landscape bed to get a clean line. Unlike other Roundup products which add chemicals to speed up visual results of plant injury, expect to see results around two to four days after application.

Like Compare-N-Save, it comes in the form of a concentrate, with a recommended amount of 2.5 ounces of concentrate per gallon of water. Like with any concentrate, you can really make your bottle purchase last a long time as you’ll only need a little bit of product every time you prepare a batch.

Because of Roundup’s strength, it’s not only ideal for use around fencing, gravel, patios, and other such areas, but it’s also good for larger areas such as full lawn replacements and other big renovation projects. This stuff is also rainproof after just 30 minutes.

If there is one issue you should consider when buying Roundup, it’s that it can be prone to foaming, especially if you pour in running water when putting together the mixture. You can reduce this by pouring water in gently instead.

If you’re looking for a more heavy-duty solution to your weed problem, especially one that has a long reputation amongst homeowners and farmers, then consider getting Roundup Super Concentrate. It will kill any weed, even the most stubborn ones.

RootX – The Root Intrusion Solution

Root intrusion can be a very serious issue for any homeowner. It can occur when a tree’s roots break through a mainline pipe, causing clogging or even contamination of your water supply. Plants are extremely powerful and can break through even the toughest surfaces, and when they get into your pipes they can be a real problem. Though it might be possible to clear through roots mechanically, RootX provides a root intrusion solution that is easy and effective.

ROOTX - The Root Intrusion Solution

Mechanical cutting can leave roots in a pipe, and they will eventually regrow, making it a problem again in just nine months. Continual treatment of roots mechanically can destroy your pipes. RootX instead kills the roots on contact, and the dead roots eventually decay and are carried out with the wastewater in your pipes. This makes mechanical treatment unnecessary.

RootX’s active ingredient is the aquatic herbicide Dichlobenil. This chemical is non-caustic, non-fumigating, and non-systemic. The EPA classifies it as a General Use product, and is at the lowest chemical hazard rating of “Caution”. RootX foams on contact with water, which acts as a carrying agent that lifts the herbicide to the top of the pipe where root intrusion is most likely to occur. There are degreasing agents which clean up your pipes so the active ingredient can be easily absorbed by the roots. The foam also coats your pipes, preventing regrowth.

Application is generally simple. If you have a cleanout pipe, it’s best to use that. It will be closer to the pipes where you’ll have root problems, and will then be easier to introduce RootX into. If not, RootX can simply be introduced via a toilet! That being said, only use a 2-lb. jar of RootX when doing a toilet application to prevent foam overflow.

Unlike the other products on this list, RootX provides a specific solution to a specific problem. Maybe because of that narrow scope, RootX does its job very well, doing everything necessary to kill roots in your pipes and prevent them from returning. If you have a root intrusion problem, you’re probably well-served getting a batch of RootX.

Round Up Pro Concentrate 50.2% Glyphosate

Another product from this well-known brand, Roundup Pro Concentrate is a post-emergence, systemic herbicide without soil residuals. While the previous Roundup product is said to be a powerful weed killing solution, Pro Concentrate is marketed as the “professional” solution, meant to take care of any problem you may have when dealing with weeds or intruding plants.

Round Up Pro Concentrate 50.2% Glyphosate

Like Roundup Super Concentrate, it is also formulated at 50.2% glyphosate, a chemical found in many non-selective herbicides. As it is also a concentrate, it’s recommended that you dilute the mixture in a gallon of water, usually around 2.5 ounces per gallon. Like with other concentrates, you can change up the concentration of your mixture depending on your specific garden situation. Some hardier plants may need a stronger dose of herbicide.

In many respects, the Pro Concentrate is quite similar to the Super Concentrate we listed above. It takes about two to four days for the herbicide to start working. The product can also be irritating to the skin, so be sure to cover up well when applying it to your plants.

As a concentrate, Roundup Pro can last you quite a while. Not only that, but having a large amount of concentrate used sparingly can save you money since you won’t have to buy bottles very often. Roundup Pro Concentrate is a better value than the Super Concentrate, as it costs less per gallon than the Super version.

When mixing Roundup Pro Concentrate, the manufacturer recommends anywhere between 1 to 10.5 ounces per gallon of water. This will really depend on the weeds you are targeting. The type of sprayer you use should also be considered. They recommend only using clean stainless steel or plastic sprayers with their product.

All-in-all, what you get with Roundup Pro Concentrate is a good value product that works about as well as its bigger brand name cousin. Where you may run into problems is availability, as the Roundup Pro Concentrate seems to be harder to find compared to Roundup Super Concentrate. If you’re able to get your hands on it, you should be rewarded with a good, solid product that will take care of any weed issues you may have.

Roebic Laboratories K-77 Root Killer

Ending our list, we have another product meant to help with root intrusion issues. Roebic Laboratories K-77 Root Killer is a sewer and septic root killer meant to unclog your waste pipes of troublesome roots. As we’ve covered earlier, a root intrusion into your pipe system can be a massive problem, one that is both difficult and expensive to fix. A product like K-77 can then do wonders in making sure your pipes are in working order, and saving you thousands of dollars in mechanical clean-up or pipe replacements.

Roebic Laboratories K-77 Root Killer

Its active ingredient is copper sulfate pentahydrate, and the product itself is hazardous, so keep it out of reach of children. You may have problems getting your hands on this product if you live in certain parts of the United States. It is not for sale in Connecticut, Massachusetts, and the bay counties of California. It is also banned for use in septic systems in Florida.

Even given its hazardous nature, K-77 manages to clean pipes without harming the surrounding trees, ground cover, or natural bacterial content of septic tanks. It’s also safe to use in all plumbing and plastic pipes.

It’s best to follow the instructions properly. The manufacturer recommends using the root killer at night before going to bed. Pour ⅓ of the bottle into the toilet bowl and flush. Repeat this until all of the bottle’s contents have been used and discard the container. If you have a direct connection to your septic pipes, you may ought to use that as well, just be sure to put in enough water. This root killer comes in a crystal form, unlike the foaming RootX.

The manufacturer recommends using K-77 when you know that roots have penetrated your pipe infrastructure. If not, it wouldn’t make much sense to use a product that specifically cleans out your pipes. The roots can’t absorb the product if the roots aren’t in the pipes after all. If you want to prevent roots from reaching your pipes, it’s best to do so mechanically.

However, if you’re looking to get your pipes clear of any intruding roots, K-77 is an effective product that’s easy to use and gets the job done.

Things To Consider While Choosing The Best Commercial Weed Killer

It’s tempting to just throw a dart at the list and choose one of the seven products we’ve listed above, but it’s better that you really take a look at your plant situation and make the most out of your purchase. Here are just a few important things to keep in mind when you’re choosing your weapon of choice.

  • Weeds To Target

Of course, it matters to establish what kind of plants you’re planning to eradicate. Different species of weeds will require different weed killers to get rid of them. Find out what kind of plant you’re dealing with, and really try to get to know what your problem is. You may have annuals such as crabgrass and foxtails, or you may need to deal with perennial weeds like dandelion and nutsedge. What herbicide you choose is dictated by the weeds you have.

  • Type Of Weed Killer

It’s important to know what kind of weed killer to use since it will impact how often you must use the product or how large of an area you’re covering. A contact weed killer will only attack plants and weeds it comes into direct contact with, while a systemic weed killer will cover a greater area and spread. It’s important to be aware of what kind of weed killer you’re using, as the effects can be very different between brands.

  • Expected Outcome

Have a goal in mind when it comes to your personal situation. Are you taking preventive measures so that weeds don’t grow into your lawn? Are you aiming to get rid of plants already present in your garden? You’ll have to make a choice between pre-emergent and post-emergent herbicide then. The key is in the name: if you’re looking to prevent growth, go with a pre-emergent weed killer, if you want to kill an existing plant, reach for the post-emergent weed killer.

  • Safety

Be thorough and check your herbicide’s formulation and the components used. Be sure to buy a weed killer with a high safety level, one that is non-toxic and contains non-irritating ingredients. An organic or natural herbicide will also be good as it will not harm the environment or any pets you may have. Be sure to also read the instructions of your chosen herbicide and follow them precisely.

  • Effectivity

It would be a shame if you follow all the above steps and still buy a herbicide that can’t get the job done. Any brand will boast about its ability to kill weeds, so now is a good time to look through review sites and customer reviews to see if the product really does the job it claims to do. It’s best to read reviews from reliable websites, and keep an eye out for customer reviews with plenty of agreement. It’s basically a dependable second opinion.

  • Use Case

Are you killing weeds out on the lawn or clearing out roots from your pipes? This might seem like a simple point but you’d be surprised by how many make such a simple mistake. A root cleaner will not do well on plants you’d find above ground, and a typical herbicide may not do much if you flush it down the toilet. These products are designed for specific uses, so be sure to buy the one that you need for your specific situation.

  • User-Friendly

Try and find a weed killer that’s easy to use and prepare. The provided instructions should be clear and come with precise measurements. A good weed killer shouldn’t be difficult to prepare or use. Its application method should be straightforward and easy to follow. Don’t go for a herbicide that will just become a nuisance in the long run. You should be forward-thinking here, and get a weed killer that you can use easily and regularly for the foreseeable future.


Finding the best weed killer for you is wholly dependent on your needs as a homeowner, landscaper, or farmer. Let’s be honest, sometimes you need a stronger product, especially if you’re dealing with hardier types of plants. In that case, we would recommend a chemical herbicide like Compare-N-Save. If you’re environmentally conscious, then there is a lot of good to be said about organic herbicides like Doctor Kirchner or Green Gobbler. If you’re cleaning out your pipes of roots, go look at RootX or K-77. They’re all good products.

The best commercial weed killer for you is the best weed killer for your situation. Be sure to know your enemy first before taking on the challenge. Do your research and use your product well, and you should have a lawn or garden that you can be proud of for years and years to come.

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