It’s fairly easy to find a variety of wild plants that are edible — but they have a downside. Most leafy, green wild plants are very low in calories, and especially calories from fat.
On average, an active adult needs at least 2,000 calories a day to sustain his or her weight. Just as important, calories from fat do the best job of generating body heat in the cold temperatures of winter. That’s where wild nuts come into play. Of course, you could always supplement your diet with meat, but when nothing shows up on four legs, you might need to think seriously about nuts such as acorns, walnuts and chestnuts.
Acorns appear on oak trees in late summer and fall. You can pick them off the tree or off the ground, but you might have some competition from local squirrels.
You’ll also need to do some prep work, which essentially involves shelling the nuts and soaking them in water to leach out the bitter tannins. The bitterness varies depending on the oak variety, but most require a good soak in warm water for a few hours. You may also have to do a second and third round of soaking if the acorns are particularly bitter.