Perennial.
The flowers of Chrysanthemum cinerariifolium contain a natural insecticide called pyrethrin, an aromatic herb that has been used since the 1920s in the manufacture of insecticidal sprays and powders. The flowers are harvested after blooming and are dried or the oils are extracted with solvents. These compounds have been used to control human lice, mosquitoes, cockroaches, beetles and flies. They are also used to control insects in horticultural crops, grain storage and poultry pens, as well as on dogs and cats to control lice and fleas.
