Fine looking palms David (not to mention the gardens). All you show with the exception of Trachycarpus fortueni and Chamaerops, are just not capable of withstanding the winters here unless they were completely within the heat island of the inner city. Even then, every 10 or so years a bad frost would at least cripple “successfully grown” specimens of the more cold sensitive “cold hardy palms”. I’ve never seen a Brahea here, though I wouldn’t be surprised if someone has one, or has at least tried one in the open garden. I’ll bet they wouldn't appreciate the wet cold of Fukuoka’s winters however. I’ve seen Bismarckia nobilis sold online as well as at one nursery here, but never have I seen one planted out. My guess is they could grow fairly well if sited correctly, but again, it is hard to say. Scott W. would have a lot to say about this topic, but it seems he hasn’t taken an interest in this board so far.
Here is an example of how Phoenix roebelenii does outside of the urban heat island in Fukuoka. These were planted 3 years ago in a protected courtyard of an apartment complex near where I live. The first year they put on very nice growth, only to be struck down the following January. Then they sat for a year, apparently “dead”, or near dead, then this spring one flushed again, but you can hardly call it lovely to look at. The other two are toast. It is a wonder the apartment management hasn't ripped out the lot. Optimism gone astray? This is not an isolated example. Every P. roebelenii I’ve seen planted outside of the inner city suffers from a similar fate - eventual death. Clearly NOT a frost resistant species.
