Chuck, I'm in zone 6a I start some in greenhouse during winter but my new favorite way is ; I wrap the top part of the cuttings with parafilm I make sure some of the wrapped part is in soil and I stretch the parafilm over the buds to make it easier for the bud to come through, I then stick them in pots ,water and keep in indirect sun , I did this April 15 and by middle of May must of them where budded. As they leaved out I mooved them in sun. This works for me very simple , no bag, no cups ,no moisture dome ,I didn't even water them until they where leafing. I may still do a few in greenhouse just to make winter less boaring and experiments .