Guys, I have seen occasional mature plants that didn't produce a berry stem or berries, but never a whole patch that way like cheiftain described. I always thought that maybe they just skipped a year kinda like they do coming up at all, or that the root was struggling to get all the nutrients it needs. I don't pretend to know what the cause is, just sharing my thoughts. But again, Ive never seen a whole patch like that.