Threadleaf Coreopsis

Threadleaf coreopsis (Coreopsis verticillata, Asteraceae) is a rapidly spreading perennial native to eastern Canada and the United States, reaching 2 to 3 feet tall and 1 to 2 feet wide. It is distinguished by fine, thread-like foliage. Daisy-like yellow flowers with 8 untoothed petals, 1 to 2 inches wide, bloom from May through July. The plant spreads via rhizomes.

Threadleaf coreopsis grows in sun to part shade on well-drained soils (pH 6.0 to 8.0) including clay, sand, and shallow rocky substrates, hardy in Zones 3a to 9b. It is resistant to deer browse and tolerates drought, dry soil, and infertile conditions. Maintenance is low and growth is rapid. Documented disease associations include southern blight. Cultivars include 'Moonbeam' (pale yellow) and 'Zagreb' (golden yellow).