That was really great info. I had no idea some of these could possibly be hardy to zone 6 with lots of protection. Maybe someday they will come up with one that I can grow (zone 5). That would be cool. I don't have any trees in my garden.
Also didn't realize that the trunks were actually more or less a cluster of roots. That makes sense when you think about the tree fern we use for our orchids.
So, where do they get the stuff we use? Is it harvested in the wild or do they have farms where they grow these plants just for harvesting? How is it harvested? Does the tree have to be cut down?