I didn't try to grow through the winter, but I started planting seeds indoors in January for transplanting. Last week I started harvesting some of the bigger leaves periodically for nice, fresh greens. Right now I've got these transplanted in the garden, some under 6 mil cover and some open:

Seven-top turnip greens

Arugula

Rapa brocolli

Spinach

Red giant mustard

kale

red orach

collards

lettuce

cabbage, brocolli, cauliflower, kohlrabi...

So far I had only one dicey night when the temps dropped to 21 degrees F for several hours. I had thrown old sheets over the uncovered stuff for some extra protection--in the morning they seemed a little upset with me but didn't take any frost or freeze damage.

Weather looks beautiful for the next week--nothing less than 32 in the forcast.

When I was cleaning leaves last week I also discovered that 10 of my Italian parsley plants had overwintered, plus one of the swiss chard. BONUS!!! I've already got a little fresh parsley for the kitchen!