I still have a good supply of my 2010 crop of Trachycarpus wagnerianus seeds. These are grown in British Columbia, Canada where I have seen lows of -10C (-14F) with several days below freezing this past winter. As I type this is it -9C (17F). Within the past three years I have seen -11C (12F). The parent trees haven’t shown any cold damage while T. fortunei in my town have. Please see our web site: http://waggieseeds.webs.com/
I provide detailed growing instructions.
Q: cleaned or uncleaned seeds?
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If you drink, don't drive. Don't even putt.