Go Texan. 100% Locally Sourced From Our Community 8 quarts. Since 1997. Top Shelf Expanded Shale helps to loosen soils dense with clay or sand. Top Shelf Expanded Shale is great as a hydroponic growing medium. The size of the shale helps create air flow providing oxygen critical plant growth. Top Shelf Expanded Shale is a porous clay that is fired at high temperature and never breaks down. After that process, the expanded shale may hold up to 38% of its weight in water. Adding this product to potted plants will help reduce the frequency of watering. Only one application is needed to improve your soil's drainage permanently.The New Earth, makers of Top Shelf, have supplied Texans with superior composts, soils, mulches, and more since 1997 and recycles over 400,000 tons of organic material yearly and growing. Most New Earth products are taken in as organic waste and will be used to replenish the earth. Sustainability Cycle: Put back into the Earth; Organic Waste; Brought to New Earth; Created; Bagged & Shipped. US Composting Council Steel of Testing Assurance. topshelfexpandedshale.com. newearthcompost.com. New Earth is proud to play a part in recycling organic waste and creating sustainability for our communities. New Earth is a proud member of Leonard Holding Company's family business. newearthcompost.com.