It was designed with greater water holding capacity， less perlite， pumice， and a light charge of nutrients for a good back bone but plenty of room for you to amend. Ingredients that work great for large container gardening. Its base is peat moss， coco fiber， compost， perlite and pumice. Made for: Natural and organic indoor and outdoor gardening Great for large container gardening Bag: 30 gallon grow bag with less than 20 gallons of the finest quality Ingredients: including coarse peat， coco fiber， compost， perlite， pumice， worm castings， bat guano， fish bone meal， soybean meal， feather meal， kelp meal and much more. Size: 1.5 cu. ft. Plastic Made in USA Your security is our number one concern