Beginner Gardening: Help! Bushes & trees dying of mold (?), 0 by summermaddux

summermaddux wrote:
A few weeks ago, I noticed one of the bushes in front of my office had this white mold on the leaves. I was concerned and brought it to the boss's attention, but he said 'it's nothing' and dismissed it immediately. Meanwhile, this mold-looking stuff has spread to the trees and bushes on either side of the original infected bush. This mold seems to be very fast spreading and is covering most of the plant, with some of the leaves now entirely white. I don't even know what the plants ARE, let alone what this mold is. Wikipedia wasn't a huge help- it would seem to be either "white mold" or "powdery mildew". I just don't want our plants to die! Can anyone tell me what this plant disease is and how to cure it? Is there some kind of all-in-one plant aid I can use to help our plants recover?