I appreciate your sharing of knowledge and experience with these cool plants. I have found the same thing about hardiness info...very hard to track down on the internet at all, and even when I do find it, there are lots of inconsistencies! Many internet articles seem to skip entirely over the most important piece of info I'm looking for...could it possibly survive outdoors where I live? Sharing first-hand experience like you (always) do is one of the great benefits of being a member here.
I sure wish I lived where I could grow these plants to the impressive size shown in the photos. It's great to see what can be achieved in a landscape setting with good care. That's the main problem I have with your article... it makes me kick myself about not living in a place with warmer winters...! :-)