Use the food scraps you already have to grow new plants in your garden!
Re-Grow Celery: Celery is one of the easiest plants to re-grow from scraps.
You simply have to cut off the bottom of the celery and place it in a shallow container with a little warm water in the bottom. The bowl should be kept in a sunny and relatively warm place.
After a week or so, leaves will begin to grow, and you can wait and harvest these as required, or replant the celery in your garden and allow it to grow into another full-sized plant.
Carrots, Turnips, Radishes, Parsnips, Beets and Other Root Crops: Retaining the tops (where the leaves and stems join onto the root) from carrots, turnips, and other root crops will allow you to regrow them. Place the tops in a container of water and new, green tops should begin to grow in a matter of days. You can simply harvest and use these greens as they grow, or you can allow the roots to continue growing until the plants are ready to be transplanted back into the ground.
Avocado Seeds (a longer-term commitment): Avocado seeds can be used to grow a steady supply of this super food. You just have to wash the seed and use toothpicks to suspend it over water in a bowl or jar. The water should come up enough to cover the bottom inch of the seed. Keep the container in a warm place but not in direct sunlight. Remember to check the water every day and add more as needed.
**It can take up to six weeks for the stem and roots to appear and once the stem reaches about 6 inches you will need to cut it down to 3 inches. When leaves begin appearing, you can plant the seed in soil, remembering to leave about half of it above ground.