How will a Bismarkia handle a zone 5 winter?

[sashaeffer]

Here are 4 "Blue" palms I've bought from Phil at Jungle Music with the "Bizzy" being the first last fall. It overwintered in my hobby greenhouse and although didn't grow suffered I think from too much humidity inside the greenhouse. Lowest temps with my ceramic heater set to 50deg dropped down to the 30's a few times.

Damage you see on Bizzy I think is from that humidity, as other plants in there had spotting from moisture. Palm behind the Bizzy is a Blue European fan palm which SAILED through the winter in there. Other two are Blue Hesper and Blue Pindo palm I just had shipped to me in the past couple of weeks from Phil.

[TerdalFarm]

Very nice--and demonstrates my point. Bizzie is lovely but not a cheap date.
That Blue European Fan Palm is stunning. The only one I ever had, from Cistus, died years ago and I forgot how good looking they can be. And almost certainly a zone tougher than Brahea, so I now move that to #1 for blue fan palms