Originally Posted by Jack Daw

Well, Trachycarpus wagnerianus is as hardy as Trachycarpus fortunei, the only real difference is in growing habits. Waggie has thicker stem, shorter nodes and smaller, yet tougher leaves. It is suitable for growing in windy areas, that would otherwise tear fortunei's leaves, but other than that I think that in general it is the least beautiful palm of the Trachycarpus family.
Randy, let us know, how palms grown in California do in your zone 7. We here in Europe have palms practically only from 2 places: China and Spain. Other companies are more specialized on seed dealing, not living plants.
Neither of the palms, from China or Spain, can surivive our winters unprotected (I mean northern, much more frosty zones of my country, zones 5 to 7a). They can definitely survive with problems unprotected in my, southern region of Central Europe.
Trachycarpus wagnerianus stands here to winds of 100kmph or 65mph. Trachycarpus fortunei is damaged in such cases.

Both plants lose their foliage in -13°C (8,5°F) and die without any better protection at -17°C (1,5°F). However people grow them in central Europe in areas, where the annual minimums are about -20°C. No problems there, but they are forced to grow the palms protected and can't afford not to protect them in the winter.

Good luck boys!