OK, all we need to do is provide a bit of protection to be able to grow many hardy greens, even in snowy winters like the last two years.
All that means is a polycover of some sort. I've seen them in Europe and Asia used on a commercial scale.
And, we have day lengths that will support the growth of winter greens, except for a week around the winter solstice.
A sister post has photos.
Let's start growing!