Raised garden beds have many advantages, ranging from saving wear and tear on your back to giving your plants better air circulation and more sunlight. However, you dont have to nail lengths of lumber together to make a raised garden bed. Some of the most attractive, easy-to-use raised beds are made from containersand among the most versatile containers are galvanized steel troughs designed to hold water for farm animals. If you dont want to spring for the cost of a new trough, check your …