Rust on Asters
I just noticed that a new plant I recently purchased has alot of rust on the underside of the leaves (also mildew). I didn't see it when I bought the plant, so I went to look in the garden to see if other asters had it... and only an unknown dark purple one did. Does anyone know if this kind of rust overwinters or is it similar to daylily rust? I did have one new daylily with rust this year (H. 'Pardon Me') that I'm keeping away from the rest of the daylilies (no others infected) until next year. Maybe the daylily infected the asters?
I couldn't find any information as to rust hardiness, and weather I will have the same problem next year. If this is common with asters, I will just have to keep it out as I don't want to use any chemicals. Anyone have anymore information or advice on Aster Rust? I would really appreciate any help or comments, Thanks!! :)