How Do You Kill Off Blackberry Bushes

You can kill off blackberry bushes by being persistent and combining a few different methods over time.
 
If you’ve been wondering how do you kill off blackberry bushes, the truth is it won’t happen overnight because these plants are tough and they want to come back.
 
Blackberry bushes spread through an extensive root system, and if you leave even a small piece of the root behind, it can send up new shoots.
 
So the key to killing off blackberry bushes is to attack both the top growth and the roots at the same time.
 
In this post, we’ll walk through the best ways to kill off blackberry bushes, from manual digging to chemical treatments, so you can reclaim your garden or yard.
 
The methods for how do you kill off blackberry bushes include cutting, digging, smothering, and using herbicides.
 
Each approach has its own pros and cons, and sometimes the best plan is to combine a couple of them.
 
Let’s get into it so you can finally kill off those blackberry bushes for good.
 

How Do You Kill Off Blackberry Bushes: The Main Methods

When you want to kill off blackberry bushes, you have to decide whether you’re okay with using chemicals or if you prefer a more natural route.
 
No matter which way you go, you’ll need to be consistent and repeat your efforts because blackberry bushes are resilient.
 
Here are the most effective ways to kill off blackberry bushes.
 

1. Digging Up the Roots by Hand

Digging is the most straightforward way to kill off blackberry bushes if you have a small patch.
 
You’ll need a sturdy shovel, a mattock, or a pickaxe because the root crowns can be deep and woody.
 
Start by cutting back the canes so you can see what you’re dealing with.
 
Then dig around the base of each plant and pull out as much of the root system as you possibly can.
 
The goal when you kill off blackberry bushes this way is to remove the crown and all the major roots.
 
Any root fragments left behind will likely sprout again, so you’ll need to keep an eye on the area for a few months.
 
This method works best when the soil is moist because the roots come out more easily.
 

2. Smothering with Mulch or Tarps

Smothering is a great low-effort way to kill off blackberry bushes over time.
 
First, cut all the canes down to the ground with loppers or a brush cutter.
 
Then cover the entire area with a thick, heavy tarp, black plastic, or a deep layer of wood chips or cardboard.
 
The idea is to block out sunlight so the plant can’t photosynthesize and eventually starves.
 
You’ll need to leave the covering in place for at least one full growing season, sometimes longer, to truly kill off blackberry bushes.
 
This works well for large patches, but it does kill everything underneath, including grass and other plants.
 
Check the edges regularly because blackberry canes can sneak out from under the tarp and keep growing.
 

3. Using Herbicides Carefully

Herbicides can be very effective when you need to kill off blackberry bushes on a bigger scale.
 
The most common product used for this is glyphosate, and it works by being absorbed through the leaves and transported down to the roots.
 
For it to work, you need to apply it when the plant is actively growing, usually in late summer or early fall.
 
Don’t cut the canes first if you’re using a foliar spray, because you need those green leaves to absorb the chemical.
 
If you do cut them, you can try the cut-stump method, where you paint the herbicide directly onto the freshly cut stems.
 
Always follow the label instructions and wear protective gear when you use herbicides to kill off blackberry bushes.
 
And be careful around desirable plants because these chemicals don’t discriminate.
 

Tips to Make Sure You Kill Off Blackberry Bushes Completely

Killing off blackberry bushes isn’t a one-and-done job, so here are a few tips to help you succeed.
 

1. Time Your Efforts Right

The best time to start is when the plant is storing energy for winter, which is late summer to early fall.
 
That’s when herbicides are most effective at killing off blackberry bushes because the plant pulls the chemical down into its roots.
 

2. Be Persistent and Repeat

You will almost certainly get regrowth, so don’t be discouraged.
 
Just keep cutting, digging, or spraying until the plant finally gives up.
 
It might take two or three seasons of effort to fully kill off blackberry bushes.
 

3. Wear Protective Gear

Blackberry bushes have thorns that can scratch and tear your skin, so always wear thick gloves, long sleeves, and eye protection.
 
This is especially important when you’re using power tools or herbicides to kill off blackberry bushes.
 

So, How Do You Kill Off Blackberry Bushes?

You kill off blackberry bushes by combining persistence with the right method for your situation, whether that’s digging, smothering, or using herbicides.
 
The key is to attack the roots and stay consistent, because these plants will try to come back.
 
Pick the approach that matches your space and your comfort level with chemicals, then keep at it until the blackberry bushes are gone.
 
With a little patience, you can absolutely kill off blackberry bushes and enjoy a yard that’s finally free of those thorny invaders.