This famous herb is terrific as a wildflower groundcover, or as a clump in a blooming meadow, since not only foliage, but flowers are lovely and lasting. However, it can become invasive. If seeded widely, it can fill a meadow area and exclude everything else within two or three years. Yarrow has a great medieval herbal history, and has been used in medicine and magic for centuries. It is also a favorite for dried flower arrangements.