Display your container planters by making a tier-stepped rack from precut stair stringers. Buy two pressure-treated stair-step stringers with as many steps as you have containers to display. Cut two 2x4s to length (3 to 6 in. shorter than the length of the containers). Attach the 2x4s to the top and bottom sides of the stair stringers using 3-in. decking screws. Lean the assembled stringers against a fence or wall, then put a container on each step. When the growing season is over, remove the screws and disassemble the rack for easy storage.