A planter box has a solid bottom that sits on four or even more legs, raising it off the ground. Both options enable you to grow an abundance of food and flowers, though raised beds tend to be larger, with an increase of soil volume. While there are as many different materials as there are planter box sizes, a few choices are popular for a reason. The wood planter is a common, low-cost choice that is straightforward to DIY due to readily available materials. Resilient options include cypress, redtimber, and cedar.Other materials commonly used in outdoor spaces include moulded concrete or aggregate, galvanized or coated metal, and combination wood-and-metal. Why grow in planter boxes?