DIY Planter Boxes

Measurements

• Begin by using a tape measure to determine the length and width of the area that will house the planter boxes. Using a piece of chalk or a pencil, lightly mark where each end of the planter box will lie. Consider the length of the area when deciding on the thickness of the wood used to build the boxes. The thicker the wood, the less space for planting inside the finished box. Make sure when determining the width of the area that the finished box will not obstruct areas that are frequently used or limit the ability to escape the home in case of an emergency.

The Frames

• One disadvantage when building these boxes is that they will draw insects, so consider using cedar to build the frame, since cedar repels insects. Sand down all of the wood before working with it. Create the top and bottom frame by using strips of wood no smaller than two inches thick. For a decorative lip, the strips should be cut to about an inch larger than the length and the exact width of the finished box. The ends of the long strips snugly hold the smaller strips in place. Secure them with wood glue and screws. Predrill the screw holes on the corners of each long strip to avoid splitting the wood.

The Panels

• Begin with the long side panels of plywood cut to the same length and height as that desired for the finished box. Place wood glue about one inch above the bottom frame and mount the wood panel flush against it. Secure the panel with screws. Always predrill screw holes to avoid splitting the wood and place screws about every six inches. Repeat the process on the opposite side. Wipe away any excess glue on the outside of the box. The bottom panel should be cut into three pieces for added strength, then drill three to four drain holes in each piece before gluing or screwing them on. Flip the box onto its side so the bottom panels can be attached with wood glue and screws.

  The end panels should be cut to the same height and width as that desired for the finished box. Each panel should fit snugly between the two side panels. Secure them with wood glue on the bottom, left and right sides before attaching to the side panels with screws in the top and bottom corners of the side panels. Use a level to be sure the side and end panels are even. Once the end panels are screwed into place the top frame can be added by putting wood glue along the top edges of the panels and sitting the top frame upon it. Insert screws on each corner and in the center of the side panels.

Finishing

• If cedar was used for the entire box, then it can remain unfinished. Other types of wood will require a waterproofing agent, stain, paint or sealant. For planting directly into the box, line it with a plastic good for planting. Make sure the plastic has drain holes. If potted plants are being placed in it, then it will be ready to use as is. If mounting beneath a window, mounting brackets need to be purchased and properly installed. The finished planter can be secured with mounting brackets to a railing or, for the edges of decking, can just be arranged and plants added.