Centipede grass prefers a well-drained soil that is slightly acidic, with a pH of 5.0 to 6.5. The best soil for centipede grass is sandy soil or sandy loam with good drainage. Avoid heavy clay soils, as they can retain too much water, which can lead to root rot and other problems. It is also important to have a soil that is rich in organic matter, which can be achieved by adding compost or other organic materials to the soil.