A perennial herb, yarrow has a woody stem up to 75 centimetres tall. Its leaves are divided into feathery lobes. Flowers are grouped in flower heads and packed into dense domed or flat-topped clusters. Each flower head usually has five white ray florets surrounding a bunch of white or cream disc florets. Yarrow flowers between June and October.
Growing in open landscapes, yarrow often forms vast carpets. It is found throughout Europe.