Small garden areas often are easier to garden using raised-bed techniques. Although there are many ways to make raised beds, using posts and plywood often works very well in small raised-bed gardening. By setting your posts into the soil and attaching plywood panels, you can create square, rectangular, or irregularly shaped raised garden beds.
Dig holes 2 feet deep at each corner of your small raised-garden beds.
Cut your lumber to the desired height of your beds plus 2 feet. For example, if you want 2-foot high raised beds, cut the lumber 4 feet to accommodate the underground portion of the posts.
Set your posts in the holes and fill the holes. Use a level while backfilling the holes to ensure that the posts are vertical.
Cut your plywood to the length and width of your beds.
Screw the plywood to the posts. Place screws every 1-1/2 to 2 inches along the post to ensure that the wood is secure. Screw wood to all sides of the bed for structural integrity. Try to avoid leaving one side of the bed open. If you are installing your beds against another structure and can't install the final side, screw your posts on that side to the structure.