You don't even need your own yard. When Boulder, Colo., resident Kipp Nash finishes gardening his yard, which is filled with bok choy and beets, he farms his neighbor's. People even can rent unused yards online on places like Craigslist.
The farmers believe good food can equal good money and improve their diet.
"It's about being conscientious about what you are putting in your body and giving your kids to eat," VanHecke said.
Click here to learn more about SPIN Farming.
The Wall Street Journal first reported this story.