disease-resistant black-eyed susans
What types of black-eyed susans are resistant to the black rust that discolors and deforms their leaves? I want to get rid of my old plants, which usually get that rust every summer, and plant new ones. Is it OK to plant the new ones in the same place and soil? Thank you!
Carroll County Maryland
The native black-eyed Susan, Rudbeckia hirta, is relatively carefree. It evolved in our humid climate and doesn't have the disease issues of domestic black-eyed Susans. ('Goldstrum' variety is particularly notorious for problems).
It is a short-lived perennial, but self-seeds nicely.