Polygonum is a large genus of very versatile and multipurpose plants. The genus includes several climbers, ground covers, aquatics, and small perennials and annuals that can be grown quickly and easily. Most species of Polygonum are low-growing plants that produce colorful foliage and delicate flowers of various colors.
Propagated from seeds or cuttings, Polygonums are popular urban plants. They can be grown as ornamental houseplants or attractive foliage and landscape plants. Several species of Polygonum are commercially available as ground covers or border plants. These are usually sold under their common name Knotweed. My favorite is Polygonum capitatum. It is a small and low-growing ground cover that produces attractive green foliage that turns reddish, pink or bronze when grown under bright sunlight. Flowers grow in small heads of tiny pink flowers in spring, summer and autumn.
Polygonum capitatum grows in a regular soil and requires moderate watering under full or partial sun.