I have always kept 3-4 begonias, and never had any mildew problems...in fact, I didn't even know it was an issue with them. Then this summer, I went crazy and bought probably 20 different canes and rhizos, and propagated some, so I have quite a few inside now. And some of them are getting mildew. It isn't too bad yet, because I check them frequently and remove leaves and spray as necessary. But I am wondering if this can spread to my non-begonia plants, and if I will have trouble with this forever now that I got it started? Thanks for any advice anyone has to offer!