Buy online 1kg Coco peat brick for indoor gardening. Best for growing seeds starters, mixing with potting mixes or growing plants that grow well in coco peat. Cocopeat is a soft, light, and fluffy material made from coconut husks. It’s often used as a potting mix because it can hold up to five times its weight in water. 1 kg brick makes approximately 7 liters of cocopeat mix.. To use cocopeat, you can soak it in water for at least an hour, then pull it apart.