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.
Image source: Growing a Greener World (with step-by-step directions)
Image source: Polish-ed life Army Style
Image source: Joe Cullin.com
Image source: Anythingology Blog
Image source: Onion Bin Planters