Tithonia - a different butterfly bush
Butterfly lovers who would like to see a stronger visual effect than that of the official butterfly bush (genus Buddleja) may want to try one of the wild Mexican sunflowers (Tithonia). The fast growing annuals (4-5 ft in July after germination in late March) can be useful as fillers/placeholders in a garden under development. We have grown a cluster of a dozen of plants (spaced 2 ft, pinched at 12-18 in) of Tithonia speciosa 'Torch' that looks like a single bush and is covered with dozens of 3 in wide flowers of striking orange.
Pictured: flowers with Papilio polyxenes (black swallowtail) and Papilio glaucus (Eastern tiger swallowtail)