It is a hydrous phyllosilicate mineral, expands significantly when heated. Available in yellow, green, brown, black colours. It is used as soilless growing medium through which it can provide max aeration to roots and also hold more moisture compared to perlite.
Compost formulations with coir or peat, it creates ideal conditions for plant growth. It improves aeration of the soil, promotes a consistent release of added fertilizer and improves moisture retention of the soil.