How to Build Your Own Window Plant Box
- 1). Measure the width of the window to determine the proper size of the window box. Generally, window boxes are several inches narrower than the total width of the window allowing ample room for trailing or free flowing plants to fill in the area between the end of the box and the edge of the window. Larger boxes over power the window and appear out of place.
- 2). Calculate the total footage required for the window box by tripling the length and adding the sum of the widths. A width of 5 inches requires 10 inches of board. You will need two identical sections for the width, two identical sections for the length and a section for the bottom that measures 1 1/2 inches shorter than the sides. This makes it possible to attach the ends to the bottom section so that they rest flush with the sides.
- 3). Purchase 1-by-6 inch pine board from your local building supply store. These come in varying lengths. Many sell ends of lumber that may meet your needs. Ask the attendant about purchasing ends for making your window box. This is an inexpensive alternative to purchasing whole boards.
- 4). Cut the board to length and sand to remove any imperfections. Paint the sections to the desired color prior to assembling the window box. Select colors that coordinate with the color of you home and landscape. Keep in mind the primary colors of the flowers you plan to grow in the box to avoid clashing color schemes.
- 5). Drill holes in end sections where the screws will connect with the bottom section to prevent splitting the wood when adding the screws. Use a countersink drill bit to create an indentation for the screw. This allows the screw head to lie below the surface of the wood. Repeat the process for all sides.
- 6). Assemble with screws beginning at one of the short sides and working your way around the box. Cover the ends of the screws with a dab of spackle or wood putty and allow to dry. Touch up with paint to conceal the screws. Drill six to eight 1/4 to 1/2-inch holes in the bottom of the window box to allow for drainage.