Organic Lawn Care For the Cheap and Lazy – [Richsoil.com] Optional: * Fertilize with an organic fertilizer in the fall and spring. I recommend the Ringer brand. * Have the pH of your soil professionally tested. Add lime if it is below 6.0 and gardener’s sulfur if it is above 7.0. * How much top soil do you have? See how deep a shovel will go into the soil. How deep can you dig a hole in one minute? If you have less than four inches of soil, you must add topsoil.