A pleasantly aromatic late-summer bloomer native to the northern hemisphere, Yarrow produces one or more stems from 8 in. to 3 1/2 feet tall with flat-topped clusters of tiny white (sometimes pink) aster-like flowers, and feathery bipinnate leaves distributed along the stems. Achillea millefolium is a highly variable, cosmopolitan species complex comprised of native and introduced plants that have hybridized with one another, and is highly successful throughout its native range, often growing as a “weed” in disturbed sites and lawns. Yarrow makes a great addition to pollinator gardens and naturalistic landscapes and is often cultivated for its ornamental and herbal qualities. Bees and butterflies love Yarrow. It also has a number of purported medicinal uses. Achilles, after whom the genus is named, was said to have carried it with him to staunch the flow of blood in battle wounds.