Container gardening provides flexibility to garden practically anywhere. It allows office workers, apartments dwellers and home owners to grow their favorite herbs, flowers, vegetables or plants in planters and place them strategically around their houses or mount them on windows, walls, fences and railings. Although planters of various materials, shapes and sizes are easily available for sale in the market, building one yourself allows you to customize it. Depending on personal taste, paint your wood container planter a bright color so it draws attention, or leave it as it is for natural appeal.
Cut five wooden boards to size for your rectangular planter with a handsaw. Keep the dimensions of two long sides identical to form the planter's front and back. Also cut two identical small boards to form the planter's sides. Keep the base equal in length to the two long sides. The width of the base should be 2 inches shorter than the length of the short boards. Sand the edges of each board. Although the dimensions depend on personal requirement and space available, the height of the box should be at least 9 inches to provide sufficient room for roots to spread and grow.
Drill ½- to 1-inch wide drainage holes over the base piece. Space these holes 8 inches apart.
Lay the base board flat on your worktable, and position a long board (planter's front) flush against its long edge. Drill a row of wood screws, 3 inches apart, into the lower edge of the front board that penetrate the base board to hold them together. Repeat the process with the second long board, the planter's back.
Hold a side piece over a short side of the base. Keep its top in line with the tops of the front and back board, and check both the joints with the base and front are flush. Drill three wood screws into each side to secure it to the corresponding edge of the front and back, and three screws into its lower edge to secure it to the base.
Repeat the process to join the second short board to the structure.
Inspect your planter for any weak joints. Drill additional wood screws to secure these. Paint your planter a bright color so it stands out, or use a coat of neutral weather-shield coating to protect it from natural outdoor elements. Allow it to dry thoroughly for up to three days before filling it with soil and plants.