I have tried googling with no real answers without destroying the soil. I searched this forum and found this posting answered, but the answer suggests to mow the mint which is not an option for me.
I had bought this house where it looks like the previous owners planted a bunch of plants including mint into this raised bed that is part of 2 beds that step up a hill side (bottom bed in this picture from 2007). We tilled it about 2 years ago, got rid of all the mint roots we could find, and planted a bunch of vegetables.
After that year we left the bed to nature. This year we tilled the bed again, getting rid of all the mint roots we could find, and planted vegetables in April. Today I went to dig some holes to add additional vegetables and found a ton of mint roots everywhere.
How do I eradicate the mint from this bed without damaging the soil?