Coco Chunks by Plant Culture PHCoco Chunks is one of the most effective growing media for water retention out there. It can absorb up to 10x its weight in water, meaning the roots of your plants will never get dehydrated. They are widely used as a potting mix ingredient to maintain healthy tropical plant roots and also makes for good reptile bedding. Suitable for orchids, bromeliads, anthuriums & most tropical plants. Approx. 1 liter