how to treat hydrangea Powdery Mildew?
Im new to gardening. I bought hydrangea for 1 month already, last 2 weeks, it start moldy and got white dot on the leaves,i sprayed 'rose gun' which can treat powdery mildew, but I found it stop pruning.
Should I cut the leaves? but i dont want to cust all leaves... should I cut the flower as it stop purning?
BTW im from Melbourne and its autumn now.