Ninebark Black Spotting
Molly D. Zone4B
last year
My 5 year old ninebarks (Minnesota) were having an issue with powdery mildew. Rough year last year with drought. Now, one of them is doing particularly poorly and has tiny little black spots on the leaves and branches. I’ve pruned back the diseased branches. Is this blackspot? Treatment? Neem oil?
Thank you!
gardengal48 (PNW Z8/9)