Adding plant boxes to your windows is an inexpensive way to increase the value, enhance curb appeal, and make your house stand out in the block. Plant brightly colored tall or cascading plants and flowers in these boxes to enjoy their sight and smell from inside or outside. Although you can purchase window plant boxes in different styles, making your own allows you to customize it to your needs and requirements. Rot-resistant wood is an excellent choice for window plant boxes, as it has a natural appearance and lasts for many years.
Measure the particular window you want to dress with a plant box and note it down. Determine the length, width and depth of the plant box according to your measurements. Make sure the protrusion, if any, is equal from both ends. Select good quality 1-inch thick wood from a hardware store.
Cut your wooden board to size according to your plant box dimensions. To do this, mark the measurements for two same-size long sides (that will form the front and back), two same-size short sides (that will form the sides) and a bottom piece with a width equal to the sides and length equal to the front and back over the wood.
Cut over the marks with a handsaw and sand the edges to remove any sharp ends that can cause injury.
Drill ½- to ¾-inch drainage holes, spaced equally apart over the surface of the bottom piece. You can make them in rows or randomly spread throughout.
Lay the bottom piece on a flat surface and hold the front flush against its long edge, forming a solid joint. Nail the joint in several places to attach the pieces together. Repeat the process to attach the back to the structure the same way--squaring the corners before attaching it in place.
Hold a side of the window box between the edges of the front and back, ensuring it rests against the short edge of the bottom piece. Make sure the joints are flush and even before nailing it in place. Repeat the process to attach the other side to the structure.
Paint the window plant box to enhance its appearance and make it resistant to natural elements. Select a bright color so it stands out from afar, or clear acrylic paint if you want to preserve its current appearance. Leave it overnight to dry thoroughly before mounting it to your window with woodscrews, lag bolts or other mounting hardware.