Raised wall beds offer a solution to many common gardening problems, including compacted or poor soil as well as limited space or dramatic slopes. Because raised beds may be constructed to almost any height, they are often easier to maintain. In addition, they are relatively easy to construct for carpenters with moderate skill.
Drill holes throughout the landscaping timbers. Put holes at the end of each timber and at least one in the middle.
Level the perimeter of the bed. If the bed will be on a slope, make sure the ground is at the correct angle.
Place the first landscaping timber on the level ground. Double check to make sure the timber is completely level.
Drive a piece of rebar 12 inches into the ground at the end of the landscaping timber, using a sledgehammer. Angle the rebar at a 20-degree angle toward the timber's center.
Stack landscaping timbers in an alternating fashion and use rebar to nail each timber to the previous one.
Check the timbers frequently for level to ensure the end result is straight.
Fill in the bed with a mixture of potting soil and peat moss.