Answer: Usually, removal of the sod including its roots combined with mulching and a bit of weeding will control grass. However, if there is bermuda grass or other persistent weed grass type in the bed, then you will probably have to resort to chemical control such as glyphosate. This can be done as a spot treatment or, if the problem is severe, you may need to lift the perennials and apply it over over the entire area. Be sure to read and follow the instructions carefully. Your county extension should be able to help you identify the grass (or any other persistent weed) and recommend the best way and best application timing to control it. Once the grass is gone, you will need to edge the bed to keep it out.
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