Tall Coreopsis stands quite tall reaching heights of 7′ and in some cases up to 9′. Because of its height, it would be best to start with a few plants to form a loose colony. Arranged in a flat-topped cluster, the flowers comprise a disk of yellow, deepening to purple-red. This Coreopsis blooms late-summer and into fall. Tall coreopsis is also called tall tickseed. It typically occurs in prairies, dry open woods and wood margins, and along roadsides and railroad tracks. Features solitary, yellow, daisy-like flowers (1-2″ diameter) with eight yellow rays (rounded and untoothed at the tips) and flat brown center disks. Flowers bloom atop slender, erect stems with anise-scented leaves that are tripartite (divided into three narrow lance-shaped segments).
Easily grown in dry to medium moisture, well-drained soil in full sun. Thrives in poor, sandy or rocky soils with good drainage. Plants grown in dry soils tend to be shorter, open and somewhat spindly. Plants grown in medium moisture soils with consistent moisture tend to be taller and fuller. Tolerant of heat, humidity and drought. Prompt deadheading of spent flowers may encourage additional bloom and prevents any unwanted self-seeding. Freely self-seeds, and in optimum growing conditions will naturalize to form large colonies.