Some good advice here, folks. I have three kinds of fungicide that I've been rotating with the Physan 20. The main reason I cleaned the orchid house was to get everyone out so I could cut away the black rot on the plants that needed it. I have a big bottle of cinnamon, as well. But like Elaine says, when you live in this climate, you take your chances. I can't keep it from raining buckets every day for three months straight so I do what I can.