Over the years I've introduced several wild edibles into my yard. For example, last year, I scattered some Wild Carrot (Daucus carota) seeds in a few garden beds, covered them lightly with leaf mulch and walked away. A couple weeks ago, I noticed that the beds were looking lush with green growth and figured it was time to get my hands in the soil to check on the roots.
Compared with shovel-dug Wild Carrots that I've unearthed from more compacted ground, these decently-sized, pale yellow taproots came up with a steady tool-free tug. Freshly dug Wild Carrots may lack the crunch and orange-color of typical cultivated carrots, but their flavor and aroma is similarly pleasant. I chopped up the roots and added them to soups and stews with much satisfaction.
Note: In Foraging Wild Shoots: Wild Carrot, I point out that Wild Carrot is closely related to some seriously poisonous plants. Please read that post, and be sure you are 100% confident in your identification skills before gathering and eating any part of this plant.