We are in Youngstown, Ohio...right in the middle of it. Started in one corner of the three city lot plot about 5 years ago, now have 2 lots fully gardened. The front half is my take on the Back to Eden method and is city clay covered in a foot or better of tree service tree chips. The trees are doing great, as are the thistle. I may cardboard the whole front and add compost and another layer of chips.