When starting a new Sir Walter Soft Leaf Buffalo lawn, the correct soil can give your lawn a great beginning and prevent issues with nutrients and water. We highly recommend adding Bentonite Clay to sandy soils in Perth. Bentonite is a natural clay substance without any extra chemicals. It offers lasting advantages for efficient water and fertilizer use, which can save you both time and money. For the best results, be sure to mix Bentonite into your soil along with organic material such as humus.