Winter weeds to find for food.

Hello there! I'd like to find out if there are any edible weeds left out there to harvest for food in the time of frost. I just harvested my sunchokes and is there another chance to harvest again for a need of food? How will the taste improve the edible roots during the winter? Depending on climate zone, is there another chance to harvest wild greens? Please reach me if you need me. Have a good day!

Parsnips
Wild carrots
Acorns (red)
Hopniss (if you remember where the patch is)

My favorites—the winter greens still available at any time of year—are garlic mustard, dame’s rocket, and watercress. All crucifers! Some sort of hybrid turnip-kale or broccoli-raab type plant stayed green over last winter too (not a weed though).

I have heard of people bringing poke and comfrey roots inside so that they sprout and provide winter greens from their immense stored energy.

The buds of basswood or linden are edible even in winter.

I have been learning about edible lichens which aside from being an excellent survival food are rich in Vitamin D3!

Balsam fir needles are also edible and rich in Vitamin C, but they are hard to find except in boreal/high elevation forests and ornamental plantings.

Greetings! I'm in Zone 6 in the Midwest and it's snowing right now. How could we find and identify edibles during this time with conditions such as those?