Keeping your trash can improve your garden and, not to mention, help in reducing your garbage output. Your left over vegetable scraps and tea bags can supply nourishment to your new vegetables and other garden plants. When vegetable and other organic scraps are eaten and processed by compost worms it becomes a high-octane plant food, also known as worm castings. A worm compost bin will get you well on your way to a low cost and plentiful supply of vegetable fertilizer.