Salvia powdery mildew
Hi all. I have ten or so home grown (from seed) "Blue Bedder Sage" saliva, that's what my seed packet says at least. These are supposed to be perennials, and then are still putting out blooms, but as I was cleaning them up yesterday, I found powdery mildew spots on the oldest leaves. The leaves have been dying at the tips and then dropping off for a few weeks, and I couldn't figure out why. Now I think it's because of the mildew. So, is there a treatment for powdery mildew or should I just cut my losses and take out my plants? I greatly appreciate any advice, as I don't know how to deal with this mildew!