Cocopeat is highly used in mixing with soil in order to improve the soil quality. Cocopeat is made from the husks of coconut brownish in colour. The reason cocopeat should be used while doing rooftop farming/kausi kheti because it has this property that provides antifungal benefits and also helps to increase water retention. For Kausi kheti, you need to mix cocopeat with the soil in the ratio of 25:75. Doing so helps the plant to retain the soil moisture.