Build a planter box out of an old pallet.
Planter's Pad - Build the structure next to your garden for an easy-access -- and shaded -- planting station. Use 2-x-8-foot sheets of corrugated aluminum (purchased from a home center) to create the roof. Designer Jeni Hilpipre-Wright cut the sheets with tin snips and screwed them into the structure. She overlapped the seam at the top and covered it with an aluminum roof cap