Indeed I agree with your grandpa that they the boysenberries are better than any blackberry I've had. Had quite a few varieties as well. My one son always made fun of me about buying plants until he tasted one of my boysenberries. His exact words were "What are they and when can we get more"

Thanks for your follow up! Where do you grow them successfully? What is your Zone and state, if you don't mind me asking? I'm really curious if they will overwinter here in Missouri (south of St. Louis) successfully.

Zone 6a per USDA. 5b per starkbros.