Black-Eyed Susan (Rudbeckia hirta) seeds germinate more successfully when started indoors. Rudbeckia seeds need well-draining soil, full sunlight and temperatures of 70 to 75 degrees Fahrenheit to bloom. Black-Eyed Susans take 5 to 10 days to sprout, under proper planting conditions.
About this Author
Deborah Waltenburg has been a freelance writer since 2002. In addition to her work for Demand Studios, Waltenburg has written for websites such as Freelance Writerville and Constant Content, and has worked as a ghostwriter for travel/tourism websites and numerous financial/debt reduction blogs.