Plant yarrow in full sun and in well drained soil. Yarrow is deer resistant so they are especially popular in areas such as rock gardens and border plantings where deer a likely to graze. Trim back the plants after flowering to encourage more blooms. Yarrow will spread quickly so it is a good idea to divide the plants every two years or so. Yarrow has been used in the past for medicinal purposes. Available literature tells of yarrow being used for severe colds, slowing blood flow from wounds, and for treating fevers. We offer several varieties of yarrow and they are displayed below.