Second set of numbers in each combination is year material was acquired.

http://depts.washington.edu/uwbg/gardens/BGBase.php?txtSearch=phyllocladus&submitedits=&_submit_check=1

At least one of the growers, presumably in Oregon put out plants a few years ago because general outlets here had them. Including a hardware store I visit most years.

I planted a couple on Camano Island that lasted for a few years. One of them may simply have gotten shaded out, might otherwise still be there.

I tried alpinus several years ago here in SC and even with winter cold protection it crapped out and I'm generally 8a.

Heard from some of my ACS peeps and seems that drainage is key, also they are understory plants so I probably need to provide a little shade. Yes, David, they do look like Angiosperms! P. trichomanoides is prettier to my eye, with lacy leaves. P. alpinus is a tad scraggly. But they are fun to have and play around with. And Scott apparently the warm nights and humid air caused root rot in the SE. So we'll see if our drier summers are better. It's all a big experiment...

They need cool summers, low humidity and good drainage in general. The only exception is P. Hypophyllus, from Papua New Guinea. I have a beautiful P. Toatoa I grow in an air conditioned greenhouse.

That's lovely. The P. trichomanoides has a similar look. Is yours essentially in full sun?

Now that you've mentioned it, is there some over-arching reason _to grow_ this in an air-conditioned greenhouse? Is it used for some kind of research purpose? Longwood has an air-conditioned greenhouse too. It's not open to the public but I've seen some Cape Disa orchids through the window, which I believe are rotated into the regular orchid display at times.

Also how low does it have to be set? Though I think some some maritime climate plants genuinely need cool nights to survive, I think with others it is merely the fact that hot, wet soil causes them to get root rot. For those you could probably just set it at whatever temperature/dewpoint is comfortable to normal human beings. Well, normal American ones. I noticed in Australia that people are more tolerant of muggy air, up to a point. The morning I left Sydney was actually pretty warm, and somewhat humid - DPs in the low 60s, probably. Nothing like the SE, but all the same the office of my hotel, where I was waiting for a complementary ride to the train station, just left their front door open. He said they might have to turn on the AC later in the day. In the US, a business establishment doing that would have been considered crazy. The forecast that day was to go over 30C.

"They need cool summers, low humidity and good drainage in general."

Not a correction per se, but just an observation that I think sometimes when people say this, they really mean "low dewpoints". I was just in the part of NZ when tons of ungroweable stuff (in the SE) comes from. Believe me, the relative humidity is plenty high, for all of the year. https://en.wikipedia.org/wiki/Greymouth

When we visited in October, there were some impressive specimens of Phyllocladus at the UC Santa Cruz Arboretum, certainly a cool-summer climate, but not sure I would call it a low-humidity climate being so close to the ocean and being on the foggy Central Coast. This was Phyllocladus trichomanoides

Thanks - I have friends who are about to go there (and it's on my list) so I'll ask them to check them out.