Lime Frost Disease?
This cultivar has had this streak leaf disease for 3 years straight and wondering if Lime Frost is known for this disease?
Or is it simply once the plant has it, its tough to get rid of it rid?
I hate to get rid of these as they are finally established. Plus the thing blooms like crazy late in the year. I don't know of any other white bloomers late in the year that bloom this heavy.