[Big Ed]

I got my instructions from a local charity that provides free gardens to the needy (the teach a man to fish philosophy). Head of the charity is a good friend.

Anyway, I followed their instructions which were to use 2 x 8's for the beds. I don;t know if shallower would work, I figured why question a method that works for a couple bucks. They said that new pressure treated lumber is fine, just don't use the old arsenic treated stuff.