Fragrance, Color, and Beauty -- This Ground Cover Has it All! A perennial Thyme for use between paving-stones or as an edging! Mother of Thyme is an ideal choice for planting between walkway stones or bricks and used as a groundcover. Like other thymes, the leaves are highly fragrant; great to inhale as you are walking along the pathway to the front door! This prostrate, mat-forming perennial with slim stems is lined with tiny, oval, hairy leaves. Clusters of pink-purple flowers appear in summer ...