In his Species Plantarum (1753), the Swedish naturalist Carl Linnaeus (1701-1778) described and named the flower Rudbeckia after Olav Rudbeck and his son, both professors at the University of Uppsala, and hirta from the Latin meaning "rough hairy".
A stiff, upright annual or shortlived perennial native to the eastern United States, but has become endemic throughout North America. The Black-Eyed Susan is probably the most common of all American wildflowers. The characteristic brown, domed center is surrounded by bright yellow ray florets. Thrives in most soils in full sun. A true sunshine worshiper that forgives neglect.
Average planting success with this species: 80%
Height: 2-3 feet
Germination: 7-30 days
Optimum soil temperature for germination: 70F
Sowing depth: 1/16"
Blooming period: June-August
Average seeds per pound: 1,710,000
Seeding rate: 2 lbs. per acre
Suggested use: Roadsides, open fields, floral gardens, mixtures.
Miscellaneous: The state flower of Maryland. When cut, has a vase life of 6 to 10
days. Reseeds.
