Thornless blackberries hardy to zone 4?
I would like to find a thornless blackberry (like Black Satin or Loch Ness) but don't know if they would survive in my zone 4 area, although this year our low was only 9 F, while some years it's -27 F.
I really want to get a few blackberries for the back of a Peter Rabbit garden I'm planning for the nieces and nephews. I only need a few bushes. If the blackberries are out, what about jewel black raspberries? I doubt most of the kids would know the difference, but are they very thorny? How is the flavor? I would really appreciate advice from someone who's grown some of these, if possible. If not, has anyone even tasted jewel? Thanks in advance :)