You can easily enhance the beauty and appeal of your window by mounting a wooden planter under it. Not only does a window box planter filled with vibrant tall or trailing annuals, biennials and perennials look colorful and attractive from outside, but it also increases visual beauty and aroma for people inside the room. This simple container gardening option allows apartment dwellers, office workers and even homeowners a chance to enjoy colorful flowers, plants and herbs, as well as watch visiting birds and butterflies for hours on end.
Measure the width of your window, including the frame, and note it down on paper to ensure the dimensions of your window box correspond to the window and it fits below it perfectly. Keep the box 7 to 9 inches deep and as long as the window width. Make two window box planters if your window is very wide.
With a handsaw, cut two identical wooden boards for the front and back of your rectangular window box. Also cut two identical wooden boards for the sides. Keep the base equal in width to the short sides, but as long as the front and back pieces.
Rest the back piece on an even surface and hold a short side against its short edge. Butt the corners so the upper and lower sides of both boards are level. Drill wood screws to attach both the pieces together. Repeat the procedure to attach the second short side to the other edge of the back piece.
Insert the front piece parallel to the back so it rests against both the short sides. Align it so its top is in line with the tops of the three wooden boards, then drill wood screws to attach it to both side pieces.
Hold the wooden base of the window box and mark spots on it for drainage holes. Space the holes 4 to 6 inches apart, and keep them ½ inch wide. Once satisfied, grasp the base firmly and drill holes through the marks.
Flip the window box planter over so the bottom side faces you. Carefully place the base board over the two long and two short edges so it covers the cavity. Secure it by drilling wood screws on each side.
Paint your planter a bright color to make it more attractive, or stencil a design on it. Allow the paint to dry thoroughly before you mount the box.