Garden edging is a well-defined border and bed is one of the qualities of an appealing landscape. Edging materials you can use are dependent on your choice and what will match your landscape design. Edging serves as a physical barrier to keep your lawn from intruding into your flower, vegetable, and shrub beds. It also gives weeds a difficult time to cross over to your beds. Landscape Edging. Landscape edging constructs the framework of your garden.