I just got two B. multiflora in an order - dormant - One has one subterranean "tuber" and the other has like 6. Both "crowns" are the same size. They arrived with the vines completely died / brown. Will they regrow from the crowns? Or, will each tuber become a new plant, and the crown dies? Any advice for what I should do with these at this point would be greatly appreciated. Thanks!