Adding block or brick edge to a garden can greatly improve its appearance and keeps grass and weeds from growing over the edge of your carefully planned garden. Plan out your garden before hand, having a clear idea of the size and shape. Using your planned measurements, buy the correct amount of brick or block needed. Scrap block can be rescued from constructions sites to save money. Try to find enough brick to finish the job. It is better to have more than you need to prevent mismatched block when you run out.
Plan the size of your garden bed and dig it out to size. At the edge of your garden bed, dig out a trench deep enough for so that a quarter of the brick is covered when placed in the hole. If you want the entire brick in the ground, dig deeper. Flatten the bottom of the trench by pounding the dirt with the end of a piece of wood.
Create a straight line by running a tight piece of string along the edge of the garden. Place the bricks into the trench so that the top of the brick is against the string. If the bricks do not sit evenly, remove dirt as necessary. Pound the bricks with a rubber mallet so that they lie straight.
Add all the bricks along the edge so that they sit as full bricks to avoid cutting a brick. If a brick needs to be resized, break the brick using a sledgehammer and a mason's chisel. Add dirt to the front of the brick to hold it in place, and tap the brick again with the sledgehammer. Add soil to the bed so that the bricks are held in place. Tap down the wood and use a rake to smooth it out.