Answer: Eradicating blackberries is not an easy project, but it can be done. There's a vegetation killer called Round-Up that is quite effective. Round-Up's main ingredient is called glyphosate, which is a systemic. This means when it is sprayed on a plant, the plant absorbs and distributes it throughout its system. Eventually, it kills the entire plant, including the roots. Be sure to read and apply according to label directions. Repeat applications may be necessary. This herbicide can affect other plants in your landscape so use it with caution, targeting only the plants you want to get rid of. Best wishes with your project!
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