You turned me on to Shishito peppers and I turned you on to kale. You can plant it in a 5 gallon bucket if you need to and it can tolerate some shade. It's better after a frost in the fall, IMHO.
This season I am growing 'Dinosaur' Kale and ''Prism' Kale:
One of the reasons I avoided kale or spinach is I was advised by my doc years ago. They are both high in vitamin K and I have been prone to dvt’s and blood clots. I am on a blood thinner now probably forever, so I figure it’s OK to eat now. Got my seeds at the local hardware - variety is Red Russian. Can you save seeds from kale?