Here's what I do for blackspot : discard all falling leaves, spray the entire plant including canes and surrounding soil with fungicide, than add the mulch. Discard all old mulch in the Spring and add new mulch. Begin spray program - according to directions on product label. It's the kind of thing you have to keep after - follow a schedule closely - mark your calendar.
Send us a photo of your rose when it blooms - would love to see it.
