Butterfly Garden August 5, 2012July 30, 2012 by KTgreen Purple Coneflower. I’ve tried to grow coneflowers in other colors but they only last for the one season and don’t reseed. The purple coneflowers come back every year and spread. Black Eyed Susan. This is another flower that reseeds itself and returns year after year. Palamedes Swallowtail Purple Coneflowers and Black Eyed Susan Gult Fritillary on a Blue Indigo Spire. This is a salvia and another very hardy butterfly attractor. I accidentally broke a stem off of another spire so stuck it in the ground and here it is! Cosmos. The orange and yellow varieties reseed and take over. I’ve tried other colors with no success. Hamelia Patens or Firebush. Both hummingbirds and butterflies love this plant. It is not very cold hardy. I planted this one last spring and we had a mild winter so it did come back. I usually treat them as annuals. Chinese Pagoda Plant. Vera gave me this about 3 years ago and it finally bloomed this year.