Best Brush Killers to Master Your Yard

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Best Brush Killers

Brush and thick weeds can be a challenge to deal with. You could use a mower or string trimmer depending on how tall or thick it is, but that might not always be possible or practical. Another option is to use a chemical brush killer spray to kill brush.

With heavy brush, a simple weed killer is unlikely to be adequate. Here you’ll find the best brush killers that will be most effective at eliminating thick brush in a fast and simple way.

Best Brush Killers for Your Yard

To make the job go faster and smoother, be sure that you choose one of the best brush killers. Here you’ll find details of the products we feel are the top choices available.

1. Southern Ag CROSSBOW 32

Southern Ag Crossbow Specialty Herbicide Low Volatile Weed & Brush Herbicide, 32oz -QuartSouthern Ag Crossbow Specialty Herbicide Low Volatile Weed & Brush Herbicide

Most weeds and brush can be controlled with Southern Ag weed and brush killer. Rangeland, pastures, and other non-gardening areas near your home are the perfect places to use it. It’s a non-selective post-emergent (kills weeds that already exist) herbicide that aids in the eradication of aggressive weeds.

This herbicide can be applied with a variety of sprayers. All versions, whether hand-held or tractor-mounted, are suitable.

Be aware that Southern Ag has a distinct odor. Its application must be done on calm days to stop the wind from pushing it in directions it doesn’t need to go.

If you’re using a tank sprayer, mix 2-6 ounces of herbicide with 3 gallons of water to spread this weed and brush killer.

The label contains useful information about the application, which you can read before spraying. To spray to kill brush spray directly onto the foliage, thoroughly wetting it, but avoiding drips. After 10-14 days, the results should be visible. If the results aren’t quite what you’re looking for, try a second application.

With the effectiveness and all the pros of this product, it lands in the number 1 position on our Best Brush Killers list.

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  • It can be used with a variety of sprayers
  • Rainproof in as little as 2 hours after application
  • Ideal for weeds that won’t go away
  • It doesn’t harm the grass
  • It has a strong scent
  • A little pricey

2. BioAdvanced Brush Killer Plus

BioAdvanced 704655A Triclopyr Kills Kudzu, Poison Ivy and Other Tough Brush Killer Plus Non-Selective Weed Grass Control, 1-Gallon, Ready-to-UseBioAdvanced 704655A Triclopyr Kills Kudzu, Poison Ivy, and Other Tough Brush Killer Plus Non-Selective Weed Grass Control

When it comes to brush killers, BioAdvanced is a familiar name. BioAdvanced is a glyphosate-based nonselective herbicide that kills trees, shrubs, and overgrowth with ease. This herbicide inhibits the growth of invasive vines and saplings, poison ivy, and other destructive weeds in addition to woody brush.

This product is designed specifically for brush and poison ivy. It’s ideal for properties that have been ravaged by poison ivy, tough brush, and other unwanted plants and weeds such as kudzu, poison sumac, briars, wild blackberry, poison oak, wisteria, and honeysuckle among others.  The brush killer takes just a few days to work, and all of the unwanted plants should wither away after only one application.

The substance is sold as a concentrate that you can dilute with water and use in your preferred sprayer. Within 30 minutes of spraying, the product is rainproof. It is recommended that you apply it on a sunny day with a temperature above 60 degrees Fahrenheit for the best results.

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  • Kills poison ivy and woody brush
  • Kills weeds at the source
  • Large-scale applications are ideal
  • Rainproof in just 30 minutes
  • A ready-to-use version is also available (not concentrate)
  • Doesn’t always kill to the roots easily, and some plants can need several applications

3. Ortho GroundClear

Ortho GroundClear Poison Ivy and Tough Brush Killer1 - Concentrate, Makes 8 Gallons, Kills Poison Ivy, Poison Oak, Kudzu & Wild Blackberry, Kills to the Root, 32 fl. oz. Ortho GroundClear Poison Ivy and Tough Brush Killer

This is a herbicide that annihilates over 60 distinctive types of weeds as well as tough brush. The main ingredient, triclopyr, is absorbed from the plant’s leaves and destroys the roots.

There are two variations of this solution: a ready-for-use variant, and a dilatable concentrate. You can replant in the areas that have been treated in about 6 to 8 weeks.  It’s rainproof in two hours after application, and the effects are evident after 24 hours. Some plants or weeds may need a little more time to be fully eradicated. It takes about 2-4 weeks to guarantee a full kill.

Ortho GroundClear is most commonly used on hard surfaces with undesirable plants, such as the gaps in your asphalt driveways and patios.

It has the ability to destroy various types of vegetation and aid in the prevention of the plant’s regrowth. Ortho GroundClear can last longer than a year in heavy clay garden soils.

Depending on the amount of rain, you may need to reapply this herbicide. When applied in temperatures of 60 degrees Fahrenheit or higher, this herbicide containing imazapyr and glyphosate will function perfectly.

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  • Allows you to choose between ready-to-use and concentrate
  • Provides you with a battery-operated sprayer for simple use
  • If not properly sprayed, it can damage other plants and grass

4. Southern Ag Brush Killer

Southern Ag 01113 Brush Weed Killer, 1 Quart (32 oz) Southern Ag 01113 Brush Weed Killer

Southern Ag brush killer is a top-rated product that can be used in any crop field, including roadside ditches, pastures, and rangeland. It’s extremely effective in any location where it’s sprayed, yielding optimum performance.

Even on vines, brush, stumps, and other difficult-to-control weeds and plants, this brush killer is simple to use. The effects of this brush killer take about 7 days to appear. It’s possible that a second application would be required to get rid of stubborn brush.

To make Southern Ag more effective, apply it undiluted to tree stumps. When spraying vines and trees, dilute the brush killer solution with 2-8 ounces of solution per gallon of water. Using a sprayer, spray the combined solution. This should be enough to cover approximately 500 square feet. This brush killer is available in 32 ounces of concentrated form.

Triclopyr is the most powerful ingredient in this brush killer spray. It’s non-toxic to pets, humans, and other plants. In a few hours after use, this solution is rainproof. It is able to penetrate further before being washed away.

Southern Ag 01113 is capable of killing even the toughest plants, such as poison ivy. This product is a perfect remedy for these tough plants, and they will be completely killed.

Related: How to Kill Weed Trees

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  • Within a week, you’ll have results
  • Very strong formula
  • Ideal for big and spot treatments
  • It has a pungent odor
  • Very strong and needs to be used with care

5. BioAdvanced 704640B Brush Killer Spray

BIOADVANCED 704640B 704640 Brush Killer, 32-Ounce, Concentrate BIOADVANCED 704640B 704640 Brush Killer

This product eliminates invasive weeds such as kudzu, poison ivy, tough grass, poison oak, and other obnoxious plants. All of the unwanted plants will quickly wither and die after only one application.

The brush killer’s mechanism of action is interesting because it penetrates deep into the leaves and woody or green shoots. The herbicide then travels to the roots of the plants, interfering with their processes.

This brush killer destroys over 71 different types of brush and weeds. Some of the tougher roots, brush, and other weeds are among these varieties. This 32-ounce bottle of no-mix concentrate will prove to be very useful to you. 

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  • Triclopyr is used in this product (powerful)
  • Demolishes over 71 different types of weeds and brush
  • Suitable for killing wild berries, poison ivy, and poison oak
  • It has a deep-penetration formula that gets rid of tough brush
  • Rather pricey
  • For successful results, a stronger application is needed

6. Bonide BND330 – Poison Ivy and Brush Killer BK-32 Concentrate

Bonide (BND330 - Poison Ivy and Brush Killer BK-32 Concentrate (16 oz.) Bonide BND330 – Poison Ivy and Brush Killer BK-32 Concentrate

Bonide Poison Ivy and Brush Killer is a fantastic herbicide that can be used to eradicate weeds and brush in lawns and gardens. The best thing about this brush killer is that it is absolutely safe for grass and trees. This product’s formula stays exactly where you spray it, which is a great feature. Although this brush killer isn’t the fastest herbicide on the market yet it performs admirably and effectively eliminates weeds and brush plants right down to their roots. It is successful against over 70 different types of weeds, vines, and brush.

It comes in a 32-ounce container that produces a large volume of weed-killing solution.

Related: The Best Rabbit Repellent for Your Yard or Garden

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  • Ideal for spot-killing
  • Within an hour, it becomes rainproof
  • It works well on 70 different types of brush and tough weeds
  • It stays put where you spray it
  • It takes time for results to appear
  • To function at its best , it’ll need a second application

What Is a Brush Killer?

You might be wondering what brush killer is exactly and how it works. Let’s find out.

Brush is a form of woody vegetation that grows in clusters. Brush can hamper other plants’ natural growth by robbing them of water and nutrients and essentially choking them out.

As a result, brush can suffocate the grass or plants, leaving your garden or lawn in shambles. Brush also hurts the look of your yard. It’s not an attractive plant or hedge, and it’s not easy to deal with. This is where brush killers come to the rescue.  

Brush killers are herbicides that are effective at getting rid of brush from lawns and gardens. Using a brush killer appears to be easy, but it necessitates a great deal of caution. To be reliable, you must follow certain steps and take precautions when necessary. You must know how to use your brush killer properly if you want the best results.

Why Use a Spray to Kill Brush?

Various brushwood species will be lurking in your yard, ready to spread along your fence lines or develop into impassable thickets. A mixture of saplings, conifers, young trees, and vines may easily encroach on the yard’s infrequently accessed areas if left to its own devices. It’s very time-consuming if you try to cut and dig weeds out, and if by any chance the roots still remain, most brush varieties will regrow.

The best brush killers are indispensable in this situation. These chemical herbicides are powerful enough to avoid the spread of invasive brushwood plants. The type of brush you need to get rid of, the nature of the issue, and your chosen application method will determine which brush killer is best for you. 

How to Choose the Right Brush Killer?

As you know, brush killers are strong chemical solutions that make gardening easier and more pleasant. The good news is there are a growing number of excellent options on the market, and we’ll feature the best ones here.

To get rid of invasive brush for good, you’ll need to apply powerful chemical herbicides and, therefore, before purchasing, consider the best form and implementation method for each case, as well as the safety concerns that come with different products. Some of the points you must consider before selecting your brush killer are:


If you’re looking for the best brush killers, make sure to check the efficacy first. All of the products we’re covering here are known to be very effective. If you know the names of the specific weeds or brush that you’re dealing with, check the label or online description of any product you’re considering to be sure that it will kill the brush you want to eliminate. Several of the products listed above will kill just about any type of brush.

Related: Best Dandelion Killer for Lawns (That Won’t Kill Your Grass)


Brush killers from well-known brands are generally the best. This includes Southern Ag, Ortho, BioAdvanced, and Bonide. Other products may be able to get the job done too, but you’ll know you’re in good hands with these leading companies.


Whatever chemicals are present in your brush killer spray must be safe to use. When selecting a herbicide, make protection a top priority. Read the product’s protection instructions and be sure to follow them carefully. Reading the product summary can be highly beneficial in the long run. Careful application will protect the individual spraying as well as pets, children, and the environment. 

When used as guided, commercial brush-killing products are considered safe. Remember that these are dangerous chemicals that must be handled with caution.

Related: How to Clear Land of Small Trees and Brush

Water Resistance Capacity

If you apply a herbicide right before it rains, the herbicide will wash off the plant rather than destroy it. Some herbicides on the market today are engineered to be rainproof within a few hours (or even as little as 30 minutes) of application to avoid this. Brush killers come in a variety of forms that can stay in place for hours or even days. In addition to reading the description, read feedback from past customers (like Amazon reviews) to learn about the product’s water-resistance and how long it lasts.

The time it takes for a herbicide to become rainproof varies depending on the product, but it can take anything from 30 minutes to up to 24 hours, so consumers should avoid using it before a predicted rain. 

Rain is unavoidable, but making sure the herbicide is water-resistant is the safest way to ensure it works and you get results.

Related: How to Fix a Muddy Yard


Brush killers of different styles are more suited to different circumstances than others. Some people only have a small area to clear, while others have an acre or more to clear. Buyers, thankfully, have options.

Ready-to-use brush killers are generally supplied through pump-type sprayers, making them the most uncomplicated of all the products to use to spray to kill brush.

But most brush-killing herbicides are sold as a concentrated liquid that must be diluted with water before being used in a sprayer (see our list of the best backpack sprayers). In terms of coverage, concentrated herbicides are typically less costly than ready-to-use goods. However, mixing it is an extra phase that necessitates precise measurement. As a result, if you’re only treating a small area you may prefer something that’s ready-to-use. If you have a large area to treat, you may want to go with a concentrate so the cost doesn’t get out of hand.

Treatment Time

When using a herbicide to destroy the brush, patience pays off. Some brush, particularly tender vines, and grassy weeds may begin to shrivel up in a matter of days. Woody and thorny bushes with hardwood stems or trunks, on the other hand, can take up to six weeks to display signs of death. Wait it out—in most cases, the herbicide doesn’t need to be reapplied. In some instances, the product’s label might also recommend that you repurchase it. Be sure to read the instructions as each product will work differently.

Related: Reviews of the Best Weed Killers for Lawns

Best Brush Killers to Master Your Yard: Final Thoughts

Dealing with brush in your yard does not have to be the hard task that many make it out to be when using a spray to kill brush like one of the products listed above in our Best Brush Killers list.

Each property has its own unique needs and challenges when dealing with brush. Now that you know more about the pros and cons of the products on this list you will be able to choose the right brush killer spray for your yard.

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