Although not a fertiliser as such, we’ve put bentonite clay in this section as it is a fantastic soil improver. Add this to your sandy soil to achieve rapid and long lasting benefits for soil health and water efficiency. Our unimproved coastal sandy soils contain almost no clay. The addition of clay at 3% of the volume of sand will give you critical advantages in water retention, soil wettability, crumb structure and nutrient retention. Coupled with compost and manure addition, you will achieve a rich, fertile growing medium for your next landscaping project. Bulk amounts at better rates can be arranged for larger projects.