Plant!T JSCPB coco coir mix bricks promote root growth for flowers, vegetables, herbs, and more. Use these mix bricks as an alternative to potting soil to supply better aeration and the perfect amount of moisture in your garden. With the optimal air to water ratio, this mix allows your plants to grow freely and never drown in the watering process. This helps resist fungus, resulting in significant advantages in terms of quality, consistency, and production costs. Mix bricks are composed of 100 percent pure coco fiber from coconut husks. Each light weight block expands to 0.33 cubic feet or 2-2 1/2 gallons. Contains three bricks per pack.