Gardeners traditionally use edging bricks to outline the garden. This creates a finished look to the garden and helps keep mulch inside the garden. However, bricks can be placed in many more ways than simply on an edge. Try digging a shallow trench and tipping the bricks on end with one pointed edge pointed up. Stack the bricks one after another to benefit from the unique zigzag look created by this landscaping design.
No one ever said the edge of your garden needed a raised edging. Consider purchasing brick pavers to create a flat edge to the garden. Dig a wide, flat recessed area around the edge of your garden. Place the bricks or pavers flat on the ground side by side in a vertical pattern to delineate the garden's edge. Try placing two bricks horizontally, then two bricks vertically, etc., to create a unique looking pattern to your edging.