I didn’t realize they produce any type of usable fruit, that is good to know. Five years ago, one of the first trees I planted was a tiny Mt. Royal plum that instantly got eaten down to the ground by a deer. It came back nicely, but it is probably the rootstock that regrew, and I don’t know what type of rootstock it was. I’ve been grafting other stuff onto it, but it looks like this year the original stock might produce some fruit. Maybe it will turn out to be something half-way decent.