@ewhayden they are very easy to grow. These are the branches I pruned a month ago. They start very easy from cuttings. I buy only ones that are immune to WPBR. We have had that in town. The city finally took out the white pine that was infected.
This is my favorite cultivar of black currants: Chernaya Lisovenko. They remained white pine blister rust free when most of my ribes had it two years ago. I am trying to wait patiently to take some cuttings. Argh. Winter is just to long. Although maple syrup season is two or three months away!
@gjones I made some raspberry, black currant, blackberry. It was fantastic. I only have silver maples. I use those. I get a high sugar sap out of them. They are in a swamp location so maybe that helps.