I'm planning my garden for a new property that I have purchased. I like the idea of no dig gardens and want to make sure that my vegetables and other edible crops are grown organically. My dillema is that I want no dig and some terraced gardens but don't know what to use as borders that is economical. Treated pine or hardwood would be the obvious choice, but does the leached arsenic get into the plants??? Non-treated wood is not an option due to termites.