Once established Feverfew (Tanacetum parthenium or Chrysanthemum parthenium (L.) Bernh. and Pyrethrum parthenium (L.) is somewhat invasive so you need to keep an eye on it, but I like those types of herbs that don’t need to be babied. The flowers are delicate, producing alot of pollen. This herb is most well known as a relief for migraine headaches but can also be used to decrease blood clotting and help with arthritis. It is also very useful as a skin care herb both because it is an an antiinflammatory agent and has been shown to decrease the risk of skin cancer following UV exposure. It is used to calm red and irritated skin. The active ingredient of feverfew is parthenolide, a sesquiterpene lactone derived from its leaves and flowers. Unfortunately, some people do show skin sensitivity to feverfew.