My parents grow a lot of kale in Vancouver, WA. It overwinters very well and is one of the earliest bee foods in the spring.
I'm in Wyoming though, and am not sure how much stuff I can overwinter here yet. Once I have some ground to dig in a bit better, I will find out!
I found you thanks to @justclickindiva who featured you in the Pay it Forward Curation Contest. Keep up the great work!