A very hardy deer proof and drought resistant perennial. Medicinal uses date back to the 1st century. Average height is 2 feet. The leaves are pungent and the bush is smothered in small white daisy flowers with yellow centers. An excellent choice for exposed areas with poor soils or as an addition to the cottage garden. Noteworthy as as a primary remedy to treat migraine headaches. Leaves are used, picked just before blooming. Small seeds are directly sown in spring then cover lightly. Prefers half to full sun.