WOW! Illegal to have chickens, the world has truly gone mad!!!
As far as soil, they’re just in a heavy clay bed broken up with some coots style mix and mulched with old chicken bedding and poop.
Would most likely work well in pots and I plan on putting 4 or 5 in large half barrels for the deck.
We get pretty cold winters where I am so we usually just wait until the last frost to prune the minor damaged tips, the plants don’t seem to mind either.
Plant fleece would probably help reduce frost damage too.