Re: Musa Yunnansis
There are a few around.
I bought mine as itinerans var gigantea, and this will be its first winter here on the Gulf Coast. Some of the TN guys have it too. I had an extra earlier but gave it away.
As for size, I don't think anyone knows yet. I've heard there is a mat at Leu Gardens in Orlando. I will say that it went from seedling to really tall (8 ft to the top of the leaves) really fast. I dug it up and transplanted it about a month along and really set it back. It is just now starting to grow again.