I made two garden boxes during the summer, 12 x 4 feet and 1 foot high, too big to move. I used a mixture of compost, peat moss and vermiculite. I live in the thumb area of Michigan (zone 5b). I also enjoyed the fruits and vegetables of my labor.
Note: I removed some of the mixture from the sides to keep the boxes from separating to freezing (I hope).
The main question: Should I cover the boxes with tarps? Will the cold winter and snow cause the soil to be compressed-compacted? If I cover the boxes up, will it be come a haven for mice? or diseases and molds form?
To cover or not cover, that is the question!
Enjoy Life .......... Dan