Proper potting soil for the indoor gardens is one step that is often overlooked. But remember, you are providing a home for a plant and the soil need to be rich in nutrients and healthy. Many people use recycled soil, which is ok if you follow a few rules. Sterilize the soil to make sure it has no germs or bugs. Do this by placing it in the oven on low heat, 250 degrees, for an hour. Replenish nutrients that were used up in the soil. A mix of...