Achillea 'Citronella' produces lemon-yellow flowers from July to August. The stems stand 24 inches tall with grayish-green fernlike foliage, which is mildly aromatic. It does best in full sun with moderate moisture. It is attractive to butterflies and hummingbirds while resistant to deer, rabbits, and drought. Best planted in borders, this is a favorite as a cut flower and is also excellent as a dried flower. The genus name Achillea refers to Achilles, hero of the Trojan Wars in Greek mythology, who used the plant medicinally to stop bleeding and heal the wounds of his soldiers.