I have not had a real tree for many years; next year, I may change that. Last Saturday, I visited Hunter Family Farm (https://www.hunterfamilyfarm.com/home) to shoot a roll of CineStill BwXX film at 800 ISO and develop it in Diafine.
Hunter Family Farm allows you to harvest your own tree on the property or buy a freshly cut tree that they have prepared.
There was also a store where you could buy accessories for your tree.
They will take the tree you have cut to trim and prepare it for your car.
I developed the film in a stock solution that is reused. Approximately 3 minutes in both A and B solutions. I use water as a stop bath and fix it as I normally would. I used the Nikon FM3a with either the Nikon 50mm 1.8D or the Nikon 28mm 2.8D attached. I have a roll of Ilford FP4+ loaded in my Nikomat EL, and pushed 1 stop to 250 ISO for my next test of the developer. I scanned the negatives on an Epson V850 Pro with Silverfast as the software.