I picked up one I have been trying to get for awhile Black Prince. I don’t know much about it except that it is an alba or thought to be. Large berries and cold hardy. Seems to good to be true. I doubt it is cold hardy. I have 2 pieces and I’m grafting them each to a Russian rootstock. One I will protect in a container in the garage during winter. It never gets colder than 25F in my attached garage. The other is going in ground at my cottage. It is a survival of the fittest there. The rootstock was planted last year there. I’m also putting Oscar on the same rootstock. I split the leader on it. It’s ready to graft. If Black Prince fails Oscar will be fine. An excellent cultivar also.
I only have photos from the owner in CA
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