Sustainable gardening is a way of growing plants that is helpful to the environment. It means taking care of the soil and plants in a way that won't cause harm and that will help take care of the planet for many years. To do this, sustainable gardeners use special techniques like composting, mulching, and growing native plants. Composting is when you save the parts of plants that are left over and make them into a mixture that can help feed the soil they grow in. Mulching is when you put a layer of material, like straw or leaves, over the soil to help keep it healthy. Growing native plants means using plants that have always grown in a certain area, because they are more likely to survive and also take less water to grow.