Low, Edging Herbs. Lower-growing plants up to about 12 inches tall can line the edge of the garden or rest at the feet of a taller plant. Stick with one or two kinds of herbs in the edging to give the garden a distinct form and a sense of unity. Get to know a prospective edging plant well before you make a commitment to use a lot of it. The perfect edging is one you use in abundance, perhaps parsley or alpine strawberries, because you'll have plenty to harvest.
Some herbs look good at the start of spring but get scraggly later.
Others take a long time to regenerate after a cold winter, and their barren stems detract from the beauty of the spring garden. Try to find an edger that avoids these flaws in your climate. You can also look for edging herbs with colors and textures that complement nearby companion herbs. Finally, for a really knock-out edging along paths, choose fragrant herbs that will cascade out onto the walkway and fill the air with perfume when you brush by. Medium Height Herbs.