I decided that I would get Blue Roses, but I'm tired of trying to figure out what regular roses are and hybrid roses. Can you just put 2 Blue Roses together, and will that create more?
I don't really know how to answer your question since I'm not savvy on the subject. I will say that so far, none of my blue roses have spawned from more blue roses.
Try giving them more space. I started with two donated blue roses from a friend and I now have well over a hundred of them. I would water only the blue roses and they started producing more immediately.