Best Weed Killer Reviews: Complete Buyer’s Guide

Are you looking for the best weed killer to tackle annoying weeds in your yard? Then read on as we review the top options with all the Pros & Cons.
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You spent hours and hours seeding your lawn and laying down fertilizer. You consistently water your lawn and work to keep it trimmed so that it’s the best-looking yard in the neighborhood. Then suddenly, weeds have taken over. Or, weeds have found their way into the cracks of your driveway, patio, or sidewalk.

And, no matter how often you pull these weeds out or trim them with the weed whacker, they always seem to keep coming back for more. It might be time for a more intense solution that lasts permanently.

We’re talking about weed killers.

But, not all weed killers are the same! So, we’re going to be reviewing the top weed killers on the market today. Then, we’ll go over everything you need to know about picking the right product. Next, we’ll answer some questions you might still have about weed killers.

Let’s get to it!

Top 3 Picks

If you are in a hurry, here’s our top picks.

Best Pick: Southern Ag CROSSBOW32 Weed & Brush Killer

Southern Ag CROSSBOW32 Weed & Brush Killer, 32oz-1 Quart Crossbow Specialty Herbicide 2 4 D & Triclopyr Weed & Brus, (s) (32 oz)
  • Size: 1 Quart
  • Controls most unwanted trees and brush.
  • Use on rangeland, grass pastures, non-crop areas.
  • CONTAINS: 2,4-dichlorophenoxyacetic acid, butoxyethyl ester, Triclopyr
  • For large quantity discount consideration or to request a mixed multi-pack, please message us.

Weed killers can be a pain, especially when they kill your beautiful lawn at the same time. What we like most about this product is that it can be sprayed on your entire yard, choking out weeds and brush without impacting the health of your lovely grass. In fact, it’s so powerful that it might even be able to kill stubborn bamboo shoots within a few weeks.

Premium Pick: Roundup Pro Weed Killer Concentrate

Round Up Pro Concentrate 50.2% Glyphosate 2.5 Gallon Jug Systemic Herbicide
  • Glyphosate 50.2%
  • Round Up Pro is used in many situations from agricultural farming to industrial vegetation management. It can also be used around residential homes and commercial businesses to control unwanted weeds. Roundup Pro is also used by many highway right of way (ROW) management companies, cities, counties, and municipal governments.
  • The Round Up Pro mix rate is 1-10.5 ounces per gallon of water depending on target weed. When mixing roundup pro make sure to use only clean stainless steel or plastic sprayers

A lot of weed killers simply aren’t the best solution if you have a large property that’s overgrown with tons of weeds. With this weed killer, you can target over 435,600 square feet with over 85 gallons of weed killer once diluted properly. Though a little pricey, you can easily handle acres and acres of weeds and see impressive results in a week or two.

Organic Pick: Green Gobbler Vinegar Weed & Grass Killer

Green Gobbler Vinegar Weed & Grass Killer | Natural and Organic Weed & Grass Killer |1 Gallon
  • KILLS WEEDS & GRASS FAST - Eliminate any type of weed in just a matter of hours. Expect full desiccation in less than 24 hours. Green Gobbler contains 20% acetic acid. Use on crabgrass, dandelions, clover weeds, white clover, moss, etc.
  • SAFE TO USE ANYWHERE - Perfect for residential, commercial, industrial and agricultural use. Apply where weeds and grasses are not desired. Use on driveways, sidewalks, concrete, mulch beds, pavers, flower beds, parking lots, farmlands, barns, etc. Ready to use right out the container.
  • CERTIFIED FOR ORGANIC USE - Completely eliminates and desiccates weeds and grasses without using toxic chemicals. Made straight from corn. OMRI listed weed killer and certified for organic use.
  • POWERFUL FORMULA - NO potentially cancer-causing chemicals. Glyphosate-free. 20% formula is four times stronger than traditional table vinegar. Made strictly from ethanol distilled from corn grain.
  • 30-DAY MONEY BACK GUARANTEE - If you are not pleased, call or email us with your order number and we will reimburse your entire purchase. We value our customers and we stand behind all of our products. Expect a refund with no questions asked.

This is the best choice if you want to keep your pets and children safe with a purely organic weed killer. The main ingredient of this weed killer is vinegar, which also can kill everything in its path in as little as 24 hours. What’s even better about this weed killer is that it doesn’t have to be diluted with water like most weed killers.

Top 7 Reviews

Southern Ag CROSSBOW32 Weed & Brush Killer

The problem with a lot of weed killers is that they never seem to be as strong as they’re advertised to be. You might find yourself disappointed when you have to frequently reapply your weed killer or invest in an entirely new product if the one you’re using doesn’t seem to be working on your lawn.

So, what’s great about this product is that it includes three high power ingredients: Triclopyr, butoxyethyl ester, and 2,4-dichlorophenoxyacetic acid. The powerful combination of these three ingredients makes this herbicide effective at killing weeds as well as some bushes and trees. Those pesky dandelions, poison ivy plants, and blackberry patches are no match for this killer.

This is a great solution regardless of the size of your yard. All it takes is a mixture of up to 6 ounces of the solution and 3 gallons of water for spot treating your garden and the cracks in your sidewalk. Or, you can combine larger quantities of water and the concentrate to target larger fields and pastures on your property.

But, what you’ll love most is that this weed killer can be sprayed directly on most lawns without putting your beautiful grass in danger. So, you don’t have to go through the hassle of spot treating every individual area of your yard where weed killers tend to grow. Simply spray down the entire property and you’ll be seeing results in as little as a week’s time.

  • Perfect solution for both large properties and spot treatment
  • Can be sprayed on the entirety of most lawns without killing it
  • Strong enough to even kill bamboo shoots
  • Also kills trees and bushes in addition to weeds
  • Results might be visible in as little as a week
  • Strong chemical odour

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Roundup QuikPro Weed Killer

Another problem with weed killers is the whole dilution process. You might end up using too little concentrate and see absolutely no benefits when it comes to killing the weeds in your yard. But, you also might use too much concentrate where the solution you created kills every living plant on your property. It seems like there’s no middle ground, no matter how accurately you measure.

But, this product actually comes in 10 prepacked packets that you simply need to mix with a gallon of water. So, you can be sure that you’re getting the exact amount of Roundup recommended to kill the weeds in your yard. Just pour it in, mix it, and you’re ready to start spraying those weeds.

What’s most notable about this product is just how powerful it is. It’s actually a mixture of 73.3% glyphosate and 2.9% diquat. This combination can kill weeds in as little as 24 hours and will tackle weeds down to the roots, so you can reasonably get all of your gardening done in one quick weekend. Kill the weeds, pull them out, and then start replanting your grass or flowers.

It’s also great that this solution dries rather quickly once sprayed on weeds. That means you don’t have to worry about rain or water drowning out the effects of this high-powered solution. That also makes this product a solid choice if you live in an area of the country where rain always seems to be in the forecast.

  • Superior solution of 73.3% glyphosate and 2.9% diquat
  • Able to kill weeds in as little as 24 to 48 hours
  • Dries quickly, so rain is no issue
  • Comes pre-measured for accurate dilution
  • 10 packets in every package
  • Risk weeds will grow back after a while

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Spectracide Weed & Grass Killer Concentrate

Sometimes, you just don’t have the time to wait for weed killers to take their full effect. If it’s early spring, spraying weed killer just a little too late might throw off your entire lawn care schedule and ruin your dreams of the perfect yard. And, you might even wait weeks just to find out that the weed killer isn’t working in the first place.

When you buy this 64 ounce weed killer, you might be able to see results in as little as three hours. In a mere 24 hours, the entire weed should be dead and ready to be pulled from your yard. There’s nothing like instant gratification when it comes to things that normally take weeks to see results for.

What makes this weed killer even better is that it becomes rainproof quite quickly. Within 15 minutes, the solution is completely dried on the weeds and resistant to dilution as a result of watering and rain. That means you can be absolutely sure that this weed killer will work at full capacity and kill every single weed down to the roots.

But, this is more of a solution for spot treatment on driveways and along fences, not for use on an entire yard. It’s so powerful and heavy-duty that it might just kill your entire yard within 24 hours. Also, keep in mind that you’ll have to invest in some sort of tank sprayer in order to use this product.

  • Becomes rainproof in as little as 15 minutes
  • Weeds begin dying in 3 hours and might be completely dead in 24
  • Meant to kill your weeds all the way down to the roots
  • Speeds up the lawn care process and gets weeds killed fast
  • 64 ounces should last you a decent amount of time for spot treatments
  • Doesn’t come with a convenient sprayer, so you need to buy your own

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Green Gobbler Vinegar Weed & Grass Killer

Whether you live in a home with children or pets or simply enjoy environmentally friendly products, you might be a little wary about using products loaded with toxic chemicals. After all, these can be extremely dangerous if they’re breathed in, ingested, or even touched. That’s why you might want a weed killer like this one that doesn’t contain any glyphosate.

This weed killer actually uses high-concentration vinegar instead of glyphosate. That makes this weed killer effective for just about anything, including dandelion, clover, and even crabgrass. But, don’t assume that using vinegar makes this weed killer any less effective. It’s actually able to kill some weeds in as little as 24 hours.

What’s great about this product is just how easy it is to use. All you have to do is slip in the spray nozzle and tiny hose and begin spraying the trouble areas on your driveway or in your garden. And, you don’t even have to worry about diluting this weed killer with water. So, no longer do you have to worry about using proper measurements to get the ideal effects.

There are some things that you need to keep in mind when it comes to using this weed killer. The first is that it’s considered a non-selective herbicide. That means you definitely won’t want to use this on your entire yard unless you’re looking to purposely kill all of your grass at the same time. You’ll also want to make sure that this weed killer doesn’t topple over in your garage or home, as it does seem to permanently damage the flooring.

  • Doesn’t include glyphosate
  • Uses vinegar instead, which is all-natural and organic
  • Comes with an easy to use spray nozzle (just attach it to the bottle and spray!)
  • Might kill weeds in as little as 24 hours
  • No need to dilute it like most weed killers
  • Non-selective, so it will kill everything

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Roundup Weed & Grass Killer Concentrate

It seems like a lot of weed killers have their own unique benefits. Some work quickly while others take a little time to work completely. Some come in large portions while others are best for spot treatments. Some even kill the entire weed down to the root while others just kill the visible portions.

This product has the best features of all weed killers. Most remarkable is what’s known as FastAct Technology. After spraying this weed killer on those pesky weeds, you should be able to see visible results in a mere 12 hours. You should see those weeds completely gone in a week or two. But, what’s even better is that this formula will kill those weeds down the root, so they won’t just grow back in a few weeks or months.

What’s a little bothersome about some weed killers is that they come in a predetermined size, leaving you to settle for 1 gallon of weed killer when you might only need a quarter of that. This product is exactly what you’re looking for, coming in three different sizes depending on the size of your weed problem (16 ounces, 32 ounces, and 64 ounces).

It’s important to choose sizing based on the amount of coverage you need. The 16 ounces variety is perfect for smaller issues at just 1,500 square feet of coverage. 32 ounces would be better if you have a large weed problem or have entire pastures and fields that need killing, offering 3,000 square feet and 6,000 square feet of coverage, respectively.

  • Maxes out at 6,000 feet of coverage
  • Produces some results in 12 hours
  • Kills weeds down to the root in a few weeks or less
  • Comes in three sizes (16 ounces, 32 ounces, and 64 ounces)
  • Will be rainproof in as little as 30 minutes
  • Might need to boost the concentration to see the intended results (but this is not recommended by the manufacturer)

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Roundup Pro Weed Killer Concentrate

It doesn’t make that much sense to buy individual gallons of weed killer when you own a property with huge fields and pastures. This will cost you a ton of money and also adds a lot of waste to the environment. It might be a better idea to buy your weed killer in bulk, like this product that comes in 2.5 gallon bottles.

This weed killer offers an unmatchable 435,600 square feet of coverage, which is about 10 acres of coverage. That means you’ll probably need to hop on your riding lawn mower or ATV with a tank sprayer in hand to cover your entire pasture. But, the good news is that you’ll probably be seeing large scale results in as little as a few weeks.

Though the price does seem a little high for the average person, it’s actually a pretty good deal given the amount of coverage you’re getting with every single bottle. This is definitely the go-to formula if you own a large property with acres and acres of weeds growing. It just wouldn’t make much sense to buy this if you own a 1 acre property or if your weed problem isn’t that severe.

Given the amount you’ll be spending, you sure want to make sure that your weeds will be gone for good. The good news is that this weed killer seems to keep weeds at bay for a good few months before they might grow back. That’s especially useful if you own a large property and it’s quite the hassle to spray weed killer in the first place.

  • Offers a whopping 435,600 square feet of coverage
  • Perfect solution for large properties, pastures, and fields overgrown with weeds
  • Comes in a 2.5 gallon container
  • Might take several weeks to see the results

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BioAdvanced 704330A DuraZone Weed & Grass Killer

You might see that a lot of weed killers out there only seem to work in the short-term. The weeds will disappear in a few hours or a few days, but they seem to grow back stronger than ever in just a few months. That’s where this product can come in, effective at keeping weeds away for an additional six months.

This is a great solution if you’re specifically looking for spot treatment in your yard or on those stubborn sidewalk crack weeds. But, keep in mind that you’re only getting the liquid when you buy this product, not a sprayer as well. That means you will need to buy your own tank sprayer or spray bottle in order to actually use this product on weeds.

Just killing weeds in your yard is a great start, but a lot of weed killers out there fall flat when it comes to keeping weeds out in the future. What’s awesome about this weed killer is that it’s also a pre-emergent. That means it can actually kill weeds that are still under the surface or weeds that have just started taking over your yard. You don’t have to wait for them to come in anymore.

If you’re looking for more of a convenient solution, there are other variations of this product. It also comes in two different sizes if you need more or less weed killer for your property. You also have the opportunity to buy the battery operated sprayer for large properties or a hand trigger bottle for smaller spot treatment areas.

  • Kills weeds that are already there plus those that are under the surface (pre-emergent technology)
  • Awesome solution for spot treatment of weeds
  • Comes in three sizes as well as a spray bottle variety
  • Will kill dandelion, clover, chickweed, and more
  • Only needs to be used once to keep weeds away for 6 months
  • Doesn’t come with own sprayer

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Weed Killer Buyer’s Guide

We firmly believe that every product we reviewed above is great in its own way. But, not every single one of these weed killers will be the best option in your yard. That’s why you need to know exactly what to look for in your ideal weed killer. So, let’s talk about some things you need to keep an eye out for when choosing the perfect weed killer.

The Types of Weed Killers

Let’s get this misconception out of the way right now: Not all weed killers are the same! In fact, just purchasing the first weed killer that “looks good” might actually kill all of the grass in your lawn or lead to weeds growing back in just a few short months.

Here are some key terms to look out for and what they really mean.

  • Pre-emergent: This is a type of weed killer that will stop weeds from growing….before they actually grow. That means you’ll need to have a pretty good idea of where the weeds in your lawn tend to grow in the first place.
  • Post-emergent: This type targets weeds that have already begun growing in your yard. This is probably what you’re looking for if you have a weed problem in your yard.
  • Selective herbicides: This type of weed killer will only target certain species of plants. So, you won’t have to worry about your weed killer accidentally killing your grass or garden by accident.
  • Non-selective herbicides: These weed killers will kill just about any plant in their path, including your beloved lawn. You need to be extremely delicate about how you use these, as accidentally spraying another plant might lead to its death.
  • Contact: These weed killers will only kill the part of the plant that is sprayed. You might kill those stubborn weeds for now, but their weeds are still thriving and will probably cause the weed to grow back shortly.
  • Systemic: This type of weed killer will actually force the plant to absorb the weed killer. This can help to kill the plant as a whole, including those pesky roots.

Even though a weed killer has high user reviews and comes from a reputable company, that doesn’t mean that it’ll be a good fit in your yard. So, make sure you know exactly what you’re looking for.

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Coverage Offered

You might be a little shocked to see weed killers that come in 32 oz. or 64 oz. containers. But, keep in mind that containers of weed killers are pure concentrate. Weed killers need to be diluted in water, so you’re actually getting more coverage than you might think.

Most weed killers describe their coverage in terms of square feet. That can be a little confusing if you think of your yard or property in terms of acreage. So, here’s a look at simple conversions of acreage to square feet.

  • 5 acres: 21,780 square feet
  • 1 acre: 43,560 square feet
  • 2 acres: 87,120 square feet

It’s better to order more and get the job done in one batch than accidentally buy too little and not have enough to complete the job. If your yard is just on the cusp of one of the conversions, order a size up if you can. This is only really relevant if you’re planning on spraying down your entire yard with a weed killer.

But, most weed killers are used for spot treatment only. That means you won’t have to worry about spraying down your entire yard. So, there’s no need for 85,000 square feet of coverage if you’re only planning to spray those pesky weeds growing through the cracks in your sidewalk.

The Main Ingredient: Glyphosate

You’ll notice that most weed killers have one ingredient in common: Glyphosate.

This is considered a non-selective and systemic herbicide. That means it kills just about anything its path and will actually kill plants down to the root. So, this is not the type of weed killer that you want to spray on your entire yard, as it will kill your grass as well.

But, glyphosate is also very dangerous if you come into contact with it. You need to take special precautions to avoid all types of contact with this dangerous chemical. That includes wearing safety goggles to keep it from splashing into your eyes, wearing gloves to keep it from touching your skin, and wearing a mask to avoid breathing it in.

It’s also a great idea to keep children and pets away from the area for several days or weeks. This is a very toxic chemical and you don’t want accidental contact or ingestion by your beloved kids or pets.

Here’s a look at some of the other ingredients you might find in your weed killer.

  • Diquat: This is an ingredient that works fast and is considered a contact herbicide. You’ll see results quickly, but the weeds will probably grow back since you’re not killing them down to the root.
  • Imazapyr: This is a non-selective herbicide ingredient and is great for targeting all types of stubborn broadleaf weeds. It can also be used as a pre or post-emergent, making it extremely versatile.
  • Acetic acid: This is actually just vinegar. It’s known for producing very quick results without needing harsh chemicals, but it will probably kill your grass at the same time.

Obviously there are other ingredients that are common as well. Your best bet is to take safety precautions no matter what to protect you and your family from the dangers of these harmful chemicals.

Organic vs. Inorganic

Whether you buy an organic or inorganic weed killer all comes down to personal preference.

Organic weed killers are great because they come from all-natural ingredients and are less harmful to the environment and humans. That means they’re a much safer option if you have children and pets that run around in your yard. The problem is that they’re a little expensive.

Chemical weed killers are made in the lab setting and are much stronger and much more powerful than regular organic weed killers. They can clear up your weeds quickly without frequent reapplications. The issue is that they can be dangerous if touched or breathed in.


When you look at product descriptions for weed killers, you’ll see the term “rainproof” thrown around quite a bit. This term basically describes how long it’ll take for your weed killer to be resistant to rain.

As you might assume, rain and water can dilute a chemical and cause it to be less effective. Well, the same logic goes for weed killers. If it begins to rain too soon after you use your weed killer, your weed killer might be so diluted that it doesn’t kill the weeds as it should. That means you’ll probably have to reapply it within a few days anyway.

If you live in a particularly rainy or moist area of the country, you’ll want a weed killer that has a very short rainproofing period. Some can even boast being rainproof within a mere 10 minutes. Also, it might also help to make the effort to avoid using weed killers on days where rain is potentially in the forecast.

Where to Use It

Since most weed killers are non-selective, you won’t want to spray them on your entire property unless you’re looking to kill your grass at the same time. For the most part, you’ll be using weed killer as a sort of spot treatment to target specific areas of weed growth. Most often, this includes cracks in your sidewalk and driveway or areas lining your yard’s fencing.

But, there are also instances where you’ll want to use your weed killer in larger portions. For example, you might have an entire pasture or field that’s flooded with stubborn weeds instead of grass. It wouldn’t make sense to individually spray each weed in the field. In that case, you would buy a larger quantity to kill the entire field at once.


There’s no doubt about it: Weed killers can be a little expensive. But, that all depends on whether or not you’re thinking smart when buying your weed killer. Here’s a look at what we mean by that statement.

  • Buy based on the amount of coverage you need. For most products, you get somewhat of a discount if you buy in bulk. So, it makes more sense to buy a few gallon container of weed killer than several smaller bottles of weed killer.
  • Consider additional costs. A lot of weed killers only come with the actual liquid, not the spray nozzle or tank sprayer. If you have a budget in lawn care, make sure you take into account these extra costs as well.
  • Focus more on user reviews. You might think that you’re saving a ton of money on one product, only to realize that it’s not effective at all. Sometimes, it’s better to spend a little more money on a product that actually does what you need it to do.

Remember, you don’t have to buy an insane amount of weed killer to cover your whole yard. You only need as much to target the problem areas (where the weeds are).

How It’s Used

Most weed killers come in the form of concentrate, meaning you have to dilute the chemical in several gallons of water before using it. You’ll then use this diluted formula with some form of hose sprayer, backpack sprayer, or even a spray bottle.

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But, it all depends on the type of container you’re using and how much spraying needs to be done.

Here are some tips for using weed killer on your property.

  • Don’t expect results immediately, though some weed killers might begin working in just a few short hours.
  • Avoid spraying in areas where your children and pets play (or keep your children and pets away for at least several days after spraying).
  • Spray when the weather is somewhat warm and there’s no rain in the forecast.
  • Buy a size up if you’re unsure if a certain bottle will be enough for your yard.
  • Don’t spray the entire yard if it’s a non-selective herbicide or advertised as a grass killer as well.
  • Wait a few days to cut your lawn after spraying.

If you follow these tips, you’ll have a greater chance of seeing the results you’re looking for. That means no more weeds and a more visually appealing lawn!

Weed Killer FAQ

Can weed killer kill grass?

Many weed killers are known as non-selective herbicides, meaning they’ll kill any plant that they come in contact with. Some are even advertised as “weed and grass killers.” So, spraying your entire yard with this type of herbicide will likely kill your grass or at least cause it to brown. If you’re looking for mass spraying of weeds without killing your yard, you’re going to want to use selective herbicides.

What weed killer is safe for pets?

Practically any weed killer that includes chemicals will be dangerous to both pets and children. That means simply walking through areas that have been sprayed with weed killers can cause different types of cancer and other chronic health conditions to develop in your pet. To keep your pet safe, you’ll want to use all-natural organic weed killers like Green Gobbler Vinegar Weed & Grass Killer.

When does weed killer expire?

Most weed killers will actually maintain their quality for years on end without issue. But, that all depends on how you’re storing your weed killer. For the best results, you’ll want to make sure that your weed killer is stored in a cool and dry location. That would include a garage or a shed that has temperature regulation and humidity control. Failing to store your weed killer properly might make it less effective.

How many times do you have to apply weed killer?

Simply spraying your weeds once might not do the trick if the weeds have truly taken over your lawn. So, respraying might just be what you need to get rid of them for good. Check out the label for your weed killer and see what the manufacturer recommends. Keep in mind that most weed killers are meant to be used only a few times per year.

How long does weed killer take to work?

That all depends on the type of weed killer that you choose to use. For the most part, some weed killers will begin to show any results of some form in just a few short hours after application. Other weed killers might take days or weeks to begin showing signs of weed death. But, don’t assume that you need to reapply your weed killer if you do not see results quickly enough. Give it time to go into full effect.


Doing your research and making an educated decision before buying a weed killer is the most important thing that you can do. After all, you don’t want to bring home a weed killer that might end up killing your weeds and your lawn all at once.

Our top choice is the Southern Ag CROSSBOW32 Weed & Brush Killer. This is the perfect solution for any plant pests that have invaded your lawn in recent months. That includes weeds, brush, and even trees. Better yet, you can use this weed killer on large pastures or even just for small problem areas in your yard.

But, we also really like the Roundup QuikPro Weed Killer. First off, it’s really easy to use by pouring the packaged powder into a simple gallon of water. This guarantees an even mixture with the exact results you’re looking for. It also produces effects in as little as 24 hours and is considered quite the heavy-duty weed killer for just about any yard.

Now, it’s time to head out to the yard and get those pesky weeds out for good!

Robin Watson

Robin owns his own Landscape Gardening company based in the UK and has over 10 years professional experience working outdoors, creating beautiful landscapes for his clients in the UK. He is also a keen garden-grower and maintains his own fruit and vegetable gardens. He also has a level 3 Certificate in Practical Horticulture from The Royal Horticultural Society and is currently working on his first book about gardening. Contact him at

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