Black-eyed Susan is an erect herbaceous perennial in the daisy family ( Asteraceae ) native to the eastern part of the United States.

Black-eyed Susan is easy to grow, thriving in any but soggy soils. It does best in full sun but tolerates partial shade. It also bears up under hot, humid summers and, once established, will tolerate drought. The plant spreads by underground stems called rhizomes to form large clumps. Propagation can be done by division in the spring or fall, or it can be propagated by seed.

With prolific yellow daisy-like flowers that have a brownish-purple center that first mature in early summer and continue into the fall, this plant may quickly reach 2 to 3 feet tall. A rosette of leaves that originate at the base of the stem persists through the winter, creating an attractive winter ground cover. Leave the seed heads on as a winter food source for the birds.

It is utilized for perennial beds, backgrounds, in pollinator gardens, in naturalized areas, and borders. Staking may be required for large heads. Plants of this species sold in garden centers are usually named cultivars, rather than the wild-type species.

Host plant for several butterfly and moth species , particularly the Silvery Checkerspot butterfly and Wavy-Lined Emerald moth.