Palmers härdighet kan diskuteras men
Also trachycarpus fortunei Nanital seems very hardy and in my opinion may be the most cold hardy variety but has been growing very slowly here in North Carolina. Bulgaria is about as cold hardy as any other variety, I really like it for the nice stiff leaves and it seems quite vigorous as well. The famous "Windmill palm"
Have a young Nova and lost a spear during its first and very mild winter (temps in the high 20s or 30s). Grew right out of it. I heard that they do get hardier with age, are probably a bit less hardy than the typical species, but they should be able to handle a 7b when healthy and in a good spot. Always on the lookout for hardy
Trachycarpus- the Windmill Palms. Trachycarpus are relatively cold hardy and very ornamental fan palms commonly used in landscaping and gardens all over the world. New species are becoming available all the time and most are easy to grow. The following article is an introduction and discussion of most of these palms. Trachycarpus Fortunei flowers from May
Culture. In a protected location, this windmill palm is considered to be winter hardy to USDA Zone 7. It is not reliably winter hardy in the St. Louis area where it may not survive harsh winters. 
Väderkvarn Palm - En av
Etymology: nanus from the Latin literally "small" or "dwarf". "Nice, neat compact fan palm only 2' tall with little or no trunk. Supposed to be pretty cold hardy (zone 8 perhaps?) but not sure. Only a few specimens seen- rare in cultivation still, but recently becoming more available. Some of our winter hardy
Furthermore, the Trachycarpus is a hardy plant, so you could leave this plant outside in the winter. It survives the Dutch winters, if we still get a very severe winter where the temperature falls below degrees Celsius, we advise you to move it inside or protect it with special winter covers.
Tapeten Hardy Palm från
Even if you have mutations on multiple genes and even if trait is result of multiple genes, they will still follow Dominant, Recessive route. Every gene in the cells is always dominant or recesive. This is how genes and traits work. That said, only Trachycarpus fortunei specimens with degree fronds are Winsan.
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Trachycarpus fortunei cv Tesan: hardier, stout and compact trachycarpus. Trachycaprus fortunei cv Winsan: round leaves,larger petioles, unique seed branch arrangement and faster growing, suspected to be a different species because it doesn't share the hardiness trait of regular fortunei. Trachycarpus fortunei cv Misan: smaller stature.