Hi, just bought my 1st 3 dahlias ever. Sitting on my front walk waiting to be planted, but now I have bugs on them eating away, they look exactly like milkweed bugs don't know if they are, but that's what they look like. Sprayed them with soap insecticide made with castile soap last night, Anyway, bugs are still on the dahlias this morning!!? Also bought them because nursery worker told me that Dahlias are perennials, come to find out not in Michigan they aren't, so should I just get rid of them? Don't have a lot of time to battle bugs.!