I have an arctic willow that moved with me from Portland, OR to Nashville, TN that has had a really hard year. It has struggled with black spot and other diseases. I have been treating with Mancozeb 2X every 7-14 days. Waiting 4 weeks and doing it again. I have kept it under 30% shade cloth and on the damp side in a deep pot. I see you have a healthy one. Do you have any suggestions for me?
That's a picture taken at my previous home along the Hood Canal in Washington State - so, the climate it was in was very similar to Portland, and it never got sick. I have no idea how to keep it healthy in my old stomping grounds of Nashville, where I went to medical school from 1994-98, long before I got into bonsai. I hope you can get it back to health. G52
