Raised flower beds make tending your garden easy and alleviate the need to amend poor soil while adding an aesthetically pleasing look to your home. You should consider two things when building your raised flower bed: the type of plants you wish to grow and their sunlight requirements. These factors will determine the location and the depth that the plants will need to establish their root systems.
Building the Raised Flower Bed
Measure one long board and mark it at 5 feet. Use the carpenter's square to draw a straight line. Cut the board with the circular saw along the line so that you have 2 boards measuring 1-by-12-by-5 feet (these will be used in combination with the two uncut boards to form a rectangular box).
Lay one 5-foot board and one 10-foot board on their long, narrow edges (the boards should stand 12 inches tall), placing the two boards at a right angle to one another. Align the boards together so that they form a corner with the short edge of the long board flush against the end of the flat side of the short board.
Secure the two boards together with wood screws.
Place one end of the second long board against the opposite end of the first short board to form a 3-sided box; again, secure the end with wood screws. Complete the box by aligning the second short board over the ends of the long boards and secure both ends with wood screws; the finished box should measure 5-by-10 feet.
Measure one end of each wooden stake with the carpenter's square and mark a 45-degree angle. Use the circular saw to cut along the line, creating a sharp point at the end of the stake.
Place a wooden stake into each corner of the box so that the pointed ends are directed upwards and rise 6 inches above the top edge of the box. Secure with wood screws.
Turn the box over and place in your desired location. The pointed ends of the wooden stakes should be touching the ground. Use a hammer to pound each stake into the ground, securing the raised bed in place.
Preparing the Raised Flower Bed for Planting
Place a layer of cardboard in the bottom of the raised flower bed to act as a weed barrier. Layer organic materials to fill the raised bed. Each layer should be at least 2 inches thick. Layer composted manure followed by a layer of wet newspaper (four sheets thick), a layer of straw, a layer of wet newspaper, a layer of grass clippings, a layer of wet newspaper, a layer of leaves, a layer of wet newspaper and a layer of compost.
Cover the layer of compost with a 6 sheet thick layer of wet newspaper. Slice the newspaper with the utility knife. Make long rows for seeds or make an "X" for seedlings.
Add plants or seeds. Water the raised flower bed. Place a 1 inch layer of plain bark mulch (do not use pine bark mulch or colored mulch) over the garden.