My winter tunnel is full of greens. Spinach, several types of lettuce, arugula, radicchio, kale, chard, collards, salad turnips, daikon and salad radish, cilantro, some frilly red mustard, escarole, bok choi. Can't beat this balmy December weather for cool weather crops! I have parsley, escarole, broccoli, beets and kale outside with no protection.
Plants in my tunnel are from my winter seed sowing calendar, which is part of Skippy's full-season planting calendar app. I planted everything to test the planting dates in the app.
The app is $1.99 (iOS or Android). I think the price will go up for the next season (probably to $2.99), so it makes sense to get it now. All pf the app updates will apply whether your buy before or after the price increase. The calendar has spring and fall planting schedules too.
I'm counting down the days til my spring planting begins - end of February!
My only complaint with my tunnel is that I wish I had planted more of them! Next year...