More reasons why growing your own food works in the long run. You can sell off extra and you never run out of food even during extreme situations when you can't get to the grocery. So its time to be your own green grocery! Keep those food scraps and grow them back into greens for the table. Heirloom seeds are cheap and only a few minutes a day dedicated to checking your food stores and storage bins should help you keep a home green grocer going.