Help....I think it's dieing!

[anniemozz]

I got these lovely little things from bnm last year. My garden is pretty clay(y) so we keot these in pots. But they look like they're dieing?? Is there anything I can do to save them?

[SeanK]

Put them in afternoon shade and flood the pot(s) with water for the next month

[mnorell]

I'm not at all familiar with local UK gardening techniques and needs, but I can say that there is quite a community of folks in Yorkshire and surrounding areas who post very impressive videos on YouTube (like George's Jungle Garden) showing their prowess at growing not only Trachycarpus but many other palms and tropicalesque landscapes in your general region, and I'm sure if you contact any of them you would get excellent local knowledge on the subject. My own feeling is that you will be much better off putting the palm into the ground, clay or not. Cultivation in pots is far more difficult than in-ground cultivation in most cases. Also, you probably don't want the roots exposed to winter air temperatures (roots are the most cold-sensitive parts of a palm). The warmer soil will insulate, and also the surrounding soil will have the ability to wick away or supply moisture to the root-zone, whereas in a pot there are myriad missteps and misjudgments that can be made with moisture distribution and other issues, including nutrient deficiencies, which may be what is at work with your palm. Best of luck in getting your palm on track!

[Harry’s Palms]

If they are in full sun it may help to give them a bit more shade . If the soil is moist then it may need a larger pot . It looks like a good sized palm for that size pot . Check the drainage holes in the bottom of the pot for roots . You are going to start seeing cooler temps soon so protection may be needed depending on how cold your winters are. Harry

[maxum2610]

I have four of these in the ground in Belgium. Same climate as yours and in clay soil. 
Trachycarpus needs clay soil to do well. Looks like yours are in common potting soil. They will most likely wither away and die if they are left in potting soil mix. My advice: plant them in the ground before it’s too late.