Blood Flower or Sunset Flower Milkweed Monarch butterfly's Host for Egg Laying, Feeding, and Hatch and the tiny Catepillars Feed on the Milkweed. They form Chrysilises on the plant for their Metamorphosis It Takes 2 generations of Monarchs to Migrate in each direction (Canada to Pacific Grove and Mexico) and they need milkweed along their paths Plant These Seeds Yourself and Give as Gifts to Help Save the Monarch Butterfly Marde Ross & Company has been a Licensed California Nursery since 1985. Blood Flower or Sunset Flower Milkweed Monarch butterfly's Host for Egg Laying, Feeding, and Hatch and the tiny Catepillars Feed on the Milkweed. They form Chrysilises on the plant for their Metamorphosis