Hi there! Two ornamental shrubs in front of our library have a lot of what looks like powdery mildew and dead leaves. (found out what id was by searching your site!) It's been like this a few years, but looks worse this year. I don't garden, and our city workers don't do a lot of landscape management, so I'm wondering how much effort it would take to save the shrubs or if I should just ask them to pull and plant something new (there's a lot of healthy milkweed growing up behind...pollinator garden, anyone?)