This blog post shows several ways of building planters with free wood shipping pallets. Be sure to use pallets stamped as non-toxic. This stamp denotes that the pallets have not been treated with pesticides. Our Natural Building Blog now has about a dozen pages of free information on almost every aspect of pallet building (floors, paneling, walls, furniture, etc.). Use the search engine on the right side of the page using ‘pallet’ as the search phrase.