Because of the limited supply of organic foods and the extra work and maintenance required to produce them, you may be paying 20-100% more for an organic banana. Luckily, here are six vegetables and herbs you can grow indoors using the parts of produce you plan to throw away anyway. This can save you quite a bit of money next time you go grocery shopping.

1. Celery To grow this healthy snack at home, cut off the base of the celery and leave it in a container with some warm water. Keep the container in full sun and after a week your celery base will start to grow. Transplant the celery into the ground and watch it grow.

2. Romaine Lettuce Similar to celery, keep the base of your romaine lettuce in a container with ½ inch (8 ml) of warm water. Let it sit in the sun and after a week or two, your lettuce stem will produce new leaves for all your salads. Transplant the lettuce into the ground to continue growing. It should be fully mature in three to four weeks. This process also works for Bok Choy.

3. Garlic Those long green braids on your garlic clove are sprouts. You can put them in some water, lots of sunlight, and watch a bunch of garlic sprouts grow. They have a milder flavor than garlic cloves and are perfect with salads, pastas, and as a garnish.

4. Shallots You can grow shallots (green onions) in as little as five days. Simply leave at least 3cm attached to the roots of your shallot, put them in a small glass of water and top up if it evaporates.

5. Basil Do you have some basil sprigs lying around? If they are at least 12 cm long, gather them together and put them in a glass of water in full sun. When the stems reach 6 cm long, you can put them in some soil and grow your own basil plant.

6. Onions Unlike the other foods on this list, onions need to go directly into the ground to grow. Take the bottom end of the onion and plant it in a pot or directly in the ground outdoors. If potted, water when necessary.