Black-eyed Susan (Rudbeckia hirta) is a popular perennial flower native to North America. This plant typically grows to be 18 – 24 inches tall and 12 – 18 inches wide. Blooming from mid-summer to early fall, these flowers are attractive to bees, butterflies and other pollinators. This low-maintenance plant prefers well-drained soil and full sun and is drought-tolerant once established.