Viewing post #2226950 by sooby

I'd have been surprised if you didn't already have thrips The thing is to choose an insecticide you have to know what you are trying to control so as to select the best product. It just seemed to me that it would not be practical to treat new plants for something you already have.

Rust should be able to overwinter in Zone 8 equivalent because presumably not all your daylily foliage is killed and some stays green during winter. I'd guess it's more likely because you just haven't brought it in yet. I don't know how prevalent it is in Europe but it is there in some places.