Tanacetum cinerariifolium (Pyrethrum Daisy) is a showy perennial forming a compact mound of strongly aromatic, silvery, ferny foliage which remains decorative most of the year. Blooming for several weeks in early summer, shimmering white daisies hover on wiry stems above the foliage. Well-behaved, Pyrethrum Daisy self-sows mildly. Undemanding, pest and disease resistant, it is well-suited to the water-wise garden and landscape. Its flowers are also a source of natural insecticide.