Plant Cosmos sulphureus flowers, better known as golden cosmos, in your garden's sunniest spots for a spring-to-fall stream of nectar-feasting butterflies. This Mexican-desert native stands as high as 7 feet in its natural habitat. It now grows as an annual across the United States. Its yellow-eyed, golden- or clear-yellow cupped daisies crown branching stems of green, fernlike leaves. Hybridization of the plant has produced several smaller - but equally heat-tolerant - cultivars. They bloom in an array of yellows, oranges and reds for a festive display. Even first-time gardeners can successfully grow golden cosmos from seed.