Lightweight Compost Mix is a lightweight, organic blend specially designed to suit on-slab planter box applications. The organics in the mix retain moisture and reduce water reliance, whilst also providing a host of mineral and trace element benefits. Run through a 15mm screen to improve air-filled porosity, permeability and wettability properties, this blend weighs approx 600 kgs per cubic meter. Customisation is also possible for large volume orders.