Rudbeckia grandiflora, commonly known as Rough Coneflower, is a deciduous perennial herb native to the tallgrass prairies and open woodlands of the Central United States. It typically grows to a height of 3-4 feet (0.9-1.2 meters) and a width of 2-3 feet (0.6-0.9 meters). The plant features a clumping form with stiff, hairy stems and rough-textured, lance-shaped leaves. From midsummer to early fall, it produces showy daisy-like flowers with bright yellow rays surrounding a prominent, raised central cone that is dark brown to purple in color.

Rough Coneflower is valued for its long blooming period and its ability to attract pollinators such as butterflies and bees. It is often used in wildflower gardens, naturalized areas, and as a border plant. This species is drought-tolerant once established and thrives in full sun, though it can tolerate light shade. It prefers well-drained soils but is adaptable to various soil types. While generally low-maintenance, Rudbeckia grandiflora can be susceptible to powdery mildew and other fungal diseases in humid conditions. Deadheading spent flowers can encourage additional blooming and prevent excessive self-seeding.CC BY-SA 4.0