Because I was to do a presentation on
wild edibles in late March, I spent a few months familiarizing myself with what grows in and around our
yard. I ate salads made from dandelion leaves, plantain, bitter cress, wild violets, wild onion, chickweed and cleavers. I made a
coffee substitute out of dandelion
roots and a syrup out of violet flowers. I discovered that chickweed is an awesome substitute for spinach and added it to a few dishes as well. My grandparents survived by eating poke greens and whatever they could find.
While I wouldn't want to sustain myself on wild spring edibles, I could if necessary. Bittercress (which ironically isn't bitter) is probably my favorite as the flavor reminds me of a cross between cabbage and broccoli. I find I'm more tolerant of
dandelions now and have transplanted a few. Plantain was the hardest to find in early spring so I'll likely transplant a few to an area where I can pamper them a bit.
As far as
gardening, I'd look at growing some lettuce, radishes and other greens. If you use a cold frame or row cover you can start a bit early.
Edited to add: I also had a batch of dandelion leaf sauerkraut fermenting but my other half knocked it over and I didn't discover it until it was too late to add more brine. I'll be experimenting with this again in the spring.