All Purpose Potting Soil

The best way to improve your soil is to amend it with different substances, depending on the type of soil you have. Most plants thrive in loamy soil, so adding organic mulches, such as peat moss or hummus, will add nutrients and improve the soil structure. Grass clippings are another material to add that will decay slowly into the soil and add valuable nutrients. Just make sure the grass doesn't have pesticide residue on the blades that might harm plant roots.