The Q&A Archives: Mint Problem

Question: I have mint that grows in one section of our yard that I pull up all spring and summer. It has overrun a 30 foot by 6 foot section that I have dahlias, a peony, three daylillies and I use the last section for tomato plants. The roots go very deep and I have a porch and it grows under there too. Is there anything I can do to get rid of it without killing everything else. I tried digging up everything three years back and running a tiller thru which made it grow faster the next year.

Answer: As you've discovered, mint is terribly aggressive and nearly impossible to eradicate because even a tiny piece of root left in the ground can develop into a plant. Disturbing it just seems to make it want to grow that much more. Aside from hand digging the bed and screening out the last remnants of roots, you might try using Round Up on the mint plants. Round Up is a vegetation killer so if it comes in contact with your other plants, it will kill them, too. But, if you carefully paint the chemical on the plants you recognize as mint, it should be translocated to throughout the root system and kill out the mint. It will take time and patience, but it can be done. Wish there were an easier solution!

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