This organic growing medium is a great alternative to peat moss and potting soil with excellent air and moisture retention especially for too-packed or overwatered soils due to poor drainage. Extracted from coconut husks, the coir fibers’ texture is the ideal balance giving your plant room to breathe and for roots to grow freely. Often used for hydroponic cultivation and orchid growers as well. The compressed bricks are free from pathogens and seeds and suitable for organic growers. Each brick measures: 4” w. x 8” l. x 2 1/4” d. that is easy to store and ideal for portability. Once moistened with 1 1/2 gallons of water it expands to 2-2 1/2 gallons of potting medium. For this 3 pack it’s the equivalent of 7.5 gallons (1 cu ft.) with a Ph of 5.5 to 6.2. Package of 3.