Used or new timber is an excellent material to use for flower beds. Its natural-looking texture complements your garden, and it's easy to build a simple bed in one afternoon. Raised beds help flowers grow better because they have good drainage and deeply rooted weeds are suppressed by the bed itself. Many gardeners find them more comfortable to work in because it's not necessary to bend all the way to the ground.
Decide what size you want the flower bed to be. If the bed will be accessible from both sides, 4 feet wide is comfortable for most people to reach all parts of the bed. If you can only reach the bed from one side, consider limiting the bed to 2 to 2 1/2 feet wide. The length of the bed will depend on the space and your preference.
Lay a piece of 2-by-2-inch timber on the ground or on a table. This will be a corner block. Place a plank on top of the block so that the vertical edge of the plank is flush with the edge of the block.
Have a helper hold the plank in place. Drill three evenly spaced guide holes into the plank, and then drill the screws into the guide holes to attach the corner block to the plank.
Repeat Steps 2 and 3 so that two planks each have a corner block attached to both ends.
Attach the other planks to the corner blocks to make the corners. Have a helper hold the plank with the corner block attached, and then attach the other plank with three evenly spaced screws. Do this with the remaining planks to make a box.
Place the timber flower bed someplace where it will get the right amount of sun for the flowers you want to plant. Fill the bed with your choice of soil and plants.