I kept the ones that did not get powdery mildew or did not get it too bad. Got to see though which survive from the winter. I did provide protection but that dosen’t always mean that they will survive. But the ones that do I will certainly try.
I only kept one seedling from that cross Adam. Amazing they mildewed for you. Neither parent ever showed any sign of PM here. I did get a seedling that developed PM this Winter using that same pollen parent on another seed parent that should have been bullet proof. Amazing.
I would think Winter would not be a problem.
Ya I get PM real bad. I think some of it is from the way I have to grow roses. Because of my situation air circulation is about zero and there is not much I can do about it.