The 'For Peat's Sake' block is dehydrated coconut coir. Once water is added, the coir will hydrate and grow to approximately 11.5 Litres! This growing medium is 100% peat-free and can be used to support plants in pots, including house plants and vegetables.The blocks are made from 100% coconut husk and offer the optimum air to water ratio, encouraging healthy root growth.The coir includes no artificial fertiliser so when planted, should be fed organic proprietary plant food.