How to Install Plastic Landscape Edging: 5 Steps | DoItYourself.comPlastic landscape edging is a practical and inexpensive method of separating your landscaped beds from your lawn. This long-lasting divider gives a finished look to the garden and can be easily installed by any do-it-yourselfer over the course of an afternoon. Follow these 5 simple steps to install plastic edging around your landscaped beds to define them, and to keep the grass out.