BetterGrow Horticultural Grit is ideal to enhance drainage and open up the structure of compost or a repotting mix. It adds weight and makes the container more stable. it is also ideal for top dressing pots - especially recommended for alphines, rock plants, cacti and succulents - and to suppress weeds. It can also be used to decorate rockeries. This horticultural medium-grade grit is uniform, lime free and washed.