Hi, We planted 3 new birch trees early this month; 2 Whitespire single stem and 1 River Birch clump. The clump was the first to struggle with some dead dying branches and leaves but with consistent watering we see new growth and are hopeful it will recover. More concerning are the leaf spots on one of the Whitespire. I’ve included a couple of pics. I contacted the nursery for guidance with no reply, yet. We spent over $700 on these trees and are very distressed at the possibility of losing any of them. Any guidance appreciated. My Google search suggested anthracnose; would you agree and can I treat this? Thanks in advance. Cathy