The Q&A Archives: Removing Comfrey

Question: We had some earth-moving work done last fall when putting in a new septic system in an area where comfrey grew, and was getting out of control. I am afraid that the plant will be spread in an area we're planting grass in - how can I get rid of it?

Answer: Comfrey can be controlled by using an herbicide containing glyphosate applied according to the label instructions. It can also be controlled over time by cutting it short, covering it with a layer of cardboard or several pages of newspaper, then topping it with a thick layer of mulch. If you are planting grass soon, you might prefer the herbicide method. You may also find that shallow cultivation several times over the course of several weeks greatly helps reduce the number of weeds in that area -- disturbing the soil always brings lots of weed seeds to the surface where they will try to germinate and the cultivating will destroy these before they can reach much size.

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