This step by step woodworking project is about wooden modern square planter box plans. I have designed this square planter box with a modern design, so you can add decorative plans to your backyard. You should consider investing in weather resistant lumber (cedar, redwood), as the components will be exposed to the weather elements. See my other DIY projects HERE. We recommend you to invest in the best materials you could afford. Therefore, you should buy weather-resistant lumber, such as pine or cedar. Always take accurate measurements before adjusting the size of the components at the proper size. Drill pilot