Well, I may have to eat my words from previous posts. I visited Frederick Meijer Gardens & Sculpture Garden in Grand Rapids, Michigan (zone 5). Look what I found growing nicely next to one of the outbuildings.
With other stuff that isn't hardy in zone 5, e.g. that feather palm at the left. Methinks they bring it inside in the winter. It certainly looks a bit etiolated.
Well, it does look etoliated, good observation. It was planted in the ground, though. Perhaps it was in a buried container? I was just a little suprised to see it as it was not really on "display", but rather tucked away in a little bed on the side of a small outbuilding.
They can take -23.c /-4.f and have protection from the buildings so it should be ok it also could be a high altitude origin from Chile.
It should be OK, they've been growing them in Niagara, Ont. for years. The same zone 5-6 as you. They get a-lot of winter burn, but slowly keep growing.
