Harris 36 Qt. Coco Coir Coconut Fiber Potting Mix, 4-Pack is a natural and sustainable solution designed to enhance soil and potting mixes. This pack includes four compressed coconut fiber bricks that expand to provide approximately 36 quarts or 9 gallons of high-quality growing medium. for both hydroponic and organic growers, this organic substrate excels at retaining moisture and improving soil aeration. Suitable for indoor and outdoor use, it is biodegradable and disease-resistant, making it an excellent choice for promoting healthy plant growth. Model Number: COCO-4