Quck answer
Blackberry bushes can be invasive and difficult to control. There are several methods to kill blackberry bushes effectively. One option is to cut them down to the ground and dig out the roots. This requires physical labor but is an effective way to remove the bushes. Another method is to use herbicides specifically designed for blackberry control. These herbicides should be applied according to the instructions on the product label. It is important to be cautious when using herbicides and follow safety guidelines. Regular maintenance and monitoring are also necessary to prevent blackberry bushes from regrowing.
Getting rid of blackberry bushes (​Rubus​ spp.) can be a challenging task as they spread through long rhizomes, making them difficult to kill and causing some species to become invasive. Whether you are dealing with wild or cultivated blackberries, you can use organic or chemical methods to eradicate them from your yard.
Using Mowing and Herbicides
Triclopyr herbicide, when used alone or in combination with mowing, can effectively kill blackberry bushes. The best time to use it alone is midsummer on a calm day with a temperature above 80 degrees Fahrenheit. Choose a ready-to-use triclopyr product and spray the leaves until they are completely coated but not dripping. When using it in combination with mowing, mow the bushes in the fall and then apply triclopyr in late summer several weeks before dormancy to allow the herbicide time to reach the roots and kill the bush. Wear protective clothing and follow all label instructions.
Applying Herbicides and Eradicating
Glyphosate herbicide can be applied in late summer to early fall to kill blackberry bushes before the first frost. Thoroughly spray the leaves and canes with a ready-to-use glyphosate product until they are covered but not dripping. Wait about 50 days and then mow the bushes to direct more herbicide to the root system for increased effectiveness. Avoid treating drought-stressed bushes as it reduces the glyphosate’s ability to travel to the roots. Choose a glyphosate product that kills blackberries, wear protective clothing, and keep children and pets away until the chemical has dried.
Using Organic Methods
Rototilling blackberry bushes repeatedly is an effective organic approach to eradicate them. For upright varieties, cut away the canes before rototilling the remaining roots. After the first tilling, pick up any root material brought to the surface along with all pruned canes. Wear gloves to protect your hands and dispose of the roots and canes through your trash or garden waste service. Continue tilling every few weeks until no new sprouts are visible. Planting grass or a dense perennial in the area provides shade to prevent blackberry seeds from sprouting.
Mowing for Management
Mowing blackberry bushes during blooming prevents new seeds from forming and reseeding the plant, but it won’t kill it. Unless all leaves are removed, the plant can still photosynthesize and supply food to the roots. Mowing can be effective if coupled with herbicide application or tilling, which yields better results than mowing alone. Blackberries grow as perennials in USDA plant hardiness zones 6 through 8.
FAQ
1. How can I effectively kill blackberry bushes?
To effectively kill blackberry bushes, you can start by cutting them down to the ground using pruning shears or a saw. After cutting, immediately apply a non-selective herbicide containing glyphosate to the freshly cut stumps. This will prevent regrowth and kill the remaining roots. Be sure to follow the instructions on the herbicide’s label and wear protective clothing. Regularly monitor the area for new shoots and apply herbicide as needed. It may take several applications to completely eliminate the blackberry bushes.
2. Can I use natural methods to kill blackberry bushes?
Yes, you can use natural methods to kill blackberry bushes. One method is to repeatedly cut the bushes down to the ground, depriving them of sunlight and nutrients. Another natural method is to cover the area with a thick layer of mulch, such as cardboard or newspaper, to smother the bushes. You can also try pouring boiling water or vinegar directly onto the bushes to kill them. However, keep in mind that natural methods may require more time and effort compared to using herbicides.
3. How long does it take to kill blackberry bushes?
The time it takes to kill blackberry bushes can vary depending on the method used and the size of the bushes. If you use herbicides and follow the recommended application schedule, it may take several weeks to a few months for the bushes to die completely. Natural methods, such as cutting and smothering, may take longer and require ongoing maintenance. It’s important to be patient and persistent in your efforts to ensure effective elimination of the blackberry bushes.
4. Are blackberry bushes difficult to kill?
Blackberry bushes can be difficult to kill due to their vigorous growth and extensive root systems. They have thorny canes that can quickly resprout if not properly eradicated. However, with the right approach and consistent efforts, you can successfully kill blackberry bushes. It’s important to use appropriate tools, such as sharp pruning shears or a saw, and apply herbicides correctly to target the roots and prevent regrowth. Regular monitoring and follow-up treatments are also necessary to ensure complete elimination.
5. Can I remove blackberry bushes manually?
Yes, you can remove blackberry bushes manually by cutting them down and digging out the roots. Start by cutting the bushes as close to the ground as possible using pruning shears or a saw. Then, using a shovel or a digging tool, carefully dig around the base of the bush to expose the roots. Gently loosen the soil and pull out the roots, making sure to remove as much of the root system as possible. Dispose of the removed bushes and roots properly to prevent regrowth.
6. Can I kill blackberry bushes in winter?
Killing blackberry bushes in winter can be challenging as they are dormant during this time. Herbicides may be less effective during winter as the plants are not actively growing. However, you can still manually remove the bushes by cutting them down and digging out the roots. This method can be more labor-intensive but can help prevent regrowth in the following spring. It’s important to wear appropriate protective clothing and take necessary precautions when working outdoors during winter.
7. How can I prevent blackberry bushes from spreading?
To prevent blackberry bushes from spreading, it’s important to regularly monitor the area and take immediate action when new shoots appear. Cut down the shoots as close to the ground as possible and apply herbicides or natural deterrents to prevent regrowth. Additionally, you can create physical barriers, such as installing a root barrier or a deep edging, to prevent the underground spread of roots. Regularly maintain the surrounding area by mowing the grass and removing any blackberry seeds or berries to prevent further spread.