Whoever came up with the idea for raised flower beds ought to be knighted. Raised flower beds provide a nearly perfect way to eliminate weeds, offer less stooping and bending, create small-space gardening with outstanding results and need little maintenance once built. Raised beds can also be a great learning garden for children and for vegetable gardens--even root vegetables. Making them is a good do-it-yourself project.
Building the Raised Bed
Measure and cut the landscape fabric to 4 by 4 feet and lay it flat on the ground where you will erect your raised bed. This should keep weeds and grass from growing in your bed.
Cut the two 8-foot boards in half. Nail the ends of the four boards together, using at least four nails per end to create a sturdy 4-by-4-foot box. Place this box so that the edges of the boards are on top of the landscape fabric. This eliminates grass coming up on the inside of the gardening area. If your landscape fabric isn't wide enough, it is worth the time it takes to cut another strip and overlap it.
Spread the peat moss on the landscape fabric. This helps keep the moisture deep, where the roots can get to it. Add the composted manure and garden soil. You'll want to keep a 1- to 2-inch lip of the boards showing, which allows you to add fresh amended soil next year.
Rake the soil out evenly and plant your seedlings or seeds. Keep the soil moist but not wet.