An eco-friendly peat alternative! Made from compressed coconut fiber, GrowCoir exhibits a very good balance of wetting and aeration and a resistance to bacteria and fungus growth. Use as a replacement for soil or as a soil conditioner. GrowCoir coconut fiber works anywhere you would normally use peat moss, rockwool, vermiculite, perlite, or pumice…and worms love it! Growcoir contains no nutrients. The easiest thing to do is add organic fertilizer to your nutrient solution before you soak the coconut coir fiber. The resulting material is loaded with nutrients and ready to go. GrowCoir holds 8-9 times its weight of water and has a high nutrient-absorption capacity. These characteristics make it an ideal soil amendment. Very economical. block 11 x 11 x 5; Brick 2 x 3 x 6.