Possible blackspot on jilly jewel
Hi. I am new to gardening. I planted a few roses this summer. We have been having some hot humid weather. One of my roses is developing some discoloration. See pic. I was wondering if this is blackspot and what I need to do to treat. I planted these in may from heirloim roses. It is blooming well. Should I remove the blooms and buds? Destroy the leaves? Spray with something? Please help!