Dealing with Rust and Mildew on Roses | PBS-TV’s Loren Nancarrow reveals his organic treatment for rust and mildew on roses. Rust and mildew can be common problems that gardeners face when growing roses. These fungal diseases can cause unsightly blemishes on the leaves and flowers of your roses, and if left untreated, they can weaken the plant’s overall health. However, with the right approach, it is possible to effectively get rid of rust and mildew on roses. One reliable…