There are 103 species of Coreopsis, a member of the Aster family (Compositae). It is also called TICKSEED. Seven of these plants are cultivated and are an interesting and diverse group of plants. Cultivated Coreopsis perennials include auriculata, gigantea, grandiflora, lanceolata, rosea, tinctoria, and verticillata. TICKSEED grows from seed in Zones 4-10 and flower in spring or summer. Several of them tolerate dry conditions. They range in height from two to five feet and attract birds as well.

Coreopsis grandiflora ‘Sunray, Large-flower TICKSEED, a perennial, is widely cultivated in the Zones where it can be grown. It is one of several varieties of the species mother plant that is more compact in its growth habit and the blossoms are double which may not attract wildlife to feed.

Coreopsis grandiflora ‘Sunray’ grows to 2 feet high and wide and flowers in spring and summer. Grow it in sun or part shade in Zones 4-9; it is treated as an annual in chilly zones and can be grown in containers. It is native to central and southeastern united states. Give it moderate or dry watering.