Decorate your home's windows with colorful plant boxes you can make yourself. These easy container gardens can be used by homeowners who want to add a splash of color and old-fashioned charm to their home's exterior, or by apartment dwellers without access to a full-sized garden. Window boxes can be assembled from either new or scrap lumber. Add a liner to the box, or fill with self-watering pots, to avoid the need for frequent watering.
Cut a 1 by 6 into two 34-inch-long pieces to form the front and back of the window box. Cut a second 1 by 6 at 32 inches long for the bottom of the box. Use the leftover wood to make the sides of the box, which need to be 6-inch by 6-inch squares.
Angle the front of the box outward buy cutting the end pieces at an angle. Use a pencil and straight edge to draw a diagonal line from the bottom corner to a point three-quarters of an inch from the top corner. Only angle one side of the square--the back of the box will be straight to mount flush to the wall. Cut on the line.
Use wood glue to join the ends to the sidepieces. Secure with finishing nails. Glue and secure the bottom of the box last.