Goldregen has now survived, so far, two cold, Zone 5 winters. It is not cane hardy, but does grow back in spring, given sufficient moisture in the soil. I wish it were possible to know the lineage. It is a large and beautiful flower with a nice soft yellow color and ruffled petals. I would not so far call it completely free of BS, but neither is it a BS magnet like poor Joseph's Coat, which I sent to another grower in a more favorable climate. It does grow back quickly enough to become a respectably sized shrub in my yard. I expect it would be a lovely climber in a warmer climate.