The genus contains species from mountainous regions. Other species are native to grassland or dry waste ground. These are taller and herbaceous. All are confined to temperate regions of the northern hemisphere. Many are quite aromatic particularly in the dampness of the early morning or after a summer's rain or when crushed between the fingers.
Basal leaves are usually longer than stem leaves.
Most species form daisy-like flowerheads that are borne in clusters creating a greater floral impact during the summer. In general, species and cultivars require a well-draining soil of moderate fertility and a sunny location. Many of the tall growing Achilleas will grow excessively and become leggy if grown on a rich soil or when fertilized. They can be planted spring or autumn. They are also raised easily from seed, and can be readily propagated by division spring or autumn or by cuttings.