Some gardeners prefer to raise their planter beds so that the don't have to deal with soil conditions that can make gardening more difficult. They raise the beds up and fill them with the type of soil they need for the plants that they are growing. Planting beds can be made with many different materials such as stone, wood or blocks, and they can also be mounds of dirt raised above the rest of the landscaping without any walls at all, according to Texas A&M University Extension. Box, or square, beds are easy to make out of wood.
Smooth out the area so that you can build on a level surface. Use a level to check your progress. Shove out areas that are too high until the location is flat.
Place landscape timbers along the outline of the box bed. If the timbers don't fit the outline quite right, mark the section that needs to be cut off and use a handsaw to remove the end of the timber.
Tap stakes in the ground on either side of the beams on each end. Stack the rest of the timbers on top of the first row. Stack the timbers to the desired height. Place them so the ends sit up close to each other and form square corners, butting one side up against the other.
Drill a hole on each end of the top beam at a 20-degree angle. Continue down through the lower beams in the stack until you have a hole all the way to the ground. Use an auger bit and a power drill.
Hammer metal re-bar through the holes into the ground with a small sledge hammer. Hammer until the top of the re-bar is flush with the top of the stack of beams and extends at least 12 inches into the soil. Do this all the way around the planter box. There should be a hole in each end of each timber.
Remove the stakes that were on the outsides of the timbers if you want. You can keep them in place for added support if you don't mind the look.