The heirloom garden produces more then fresh food. If allowed to mature and go to seed, it can provide you with next seasons planting stock. Gardens everywhere can provide plenty, of food and seed, just by adopting different growing methods and practices. Rather then harvest your whole crop of lettuce, why not let a few plants go to seed? That way, you can produce your own fresh lettuce and produce your own lettuce seed for next season. Teach someone how to save seeds and they can feed friends, families, and neighborhoods for generations.
-Thank you for visiting, take care, Mike