Borinda boliana OK so far
Seattle has had a horrible winter this year. We had an early freeze, down to about 22F, in November, and a lot of generally cold weather.
I think 15F is the usual hardiness target for my area. It has gotten that cold several times in my life. Back in 1955 it got close to zero at the airport and into the single digits in town.
Several growers are rating it to 10F. It is still uncommon enough that I don't know the lowest temperature it has been known to survive without being defoliated.
So far it has not looked even mildly stressed. I think it might be a winner for a potentially tall clumper for western Washington and Oregon. Mine is just a baby so I have no idea how tall it could get. Nurseries seem to be consistently reporting 30 feet and I've seen no reports of taller in the USA yet. I need to dig up a start and pot it, for propagation purposes.
I live a few miles from the Chinese Garden of Seattle (that no longer exists last time I was there--but I thought they were going to put it back). I think it would make a good plant to donate if I can talk the gardners into it.
My goal is a useful ornamental. I want it to look good, but also to provide me with poles for staking tomatoes and beans.
I should also think of donating some to neighbors. One of my neighbors likes exotic things but is prone to letting them get out of control. Clumping bamboos are easier to manage. My next-door neighbor also wants a bamboo for privacy. Fargesia gigantea might be a better fit but Borinda boliana would look splendid too.