A planter box is a simple gardening structure displayed in or around the house. Depending on personal taste and budget set for the project, use teak, redwood, pine, oak, cedar or another type of wood. To begin with, build a simple square or rectangular box and move to complicated shapes when you get the hang of things. Grow flowers, plants, herbs or even fruit of your choice and display the planter outside to increase curb appeal, on a porch or driveway, or mount it on the patio or deck railing, wall or above the kitchen door.
Measure the planter's desired length, width and height and note it down on paper. Keep the dimensions in proportion to the spot where you will display the planter. Visualize how the planter filled with flowers, plants or greenery of your choice will look for appropriate dimensions.
Mark the dimensions on the 1-inch thick wooden board. Carefully cut over the marks using a handsaw until you have five lengths-- a long front piece and an identical back piece; two identical short sides or edges and a base piece as long as the front piece but equal in width to the edges. Sand each board and place it aside.
Hold the front piece and place a side piece flush against one of its corners. Raise or lower it so the tops are in level with each other. Drill three screws in to bind the pieces together.
Join the back piece to the other side the same way. Hold the pieces against each other until their tops are level. Secure the joint with three wood screws.
Join both the structures assembled in Steps 3 and 4. Place on a flat surface in such a way that the long board of the first structure rests against the side piece of the second structure (and conversely so the long board of the second structure rests against the side piece of the first), thus forming an enclosed rectangle. Butt both the joints so they are flush and secure them with wood screws to form a baseless rectangular planter.
Drill 3/4- to 1-inch holes in the base piece, spaced evenly apart. These drainage holes prevent the roots of contained plants from rotting.
Place the planter lower-side up on the flat surface. Place the base evenly on top of the four edges, ensuring it lies flat on top. Drill or hammer in screws spaced 3 inches apart on each side.