It's not a myth anymore ! Here's the proof ...
New Jersey can grow windmill palms !
According to the same link (just different page of the same thread, City Data): Page 14
http://www.city-data.com/forum/city-...-trees-14.html
Scroll down (you will see lots of pictures), continue to scroll down a couple of posts, you will see more pictures, below the last picture of this post, there's a link:
Growing Palm Trees in New Jersey Video, click it ...
After the sponsor's commercial, you will see a nursery installing a 14 foot windmill palm tree.
At the bottom of this video, I quote:
Most people don't think palm trees can grow in New Jersey, but they can. A few hearty palms can survive the New Jersey winters and people throughout the state are planting them to give everything a more tropical look. (Video by Ed Murray /The Star-Ledger)
According to USDA Plant Hardiness Zones: New Jersey
http://planthardiness.ars.usda.gov/PHZMWeb/#
6a, 6b, 7a, 7b
I don't know WHERE it was in the video but I kind of heard the nursery is "Tucked Away Farms ..."