Grodan Improved Gro-Block Media Amount:64 blocks giving you enough for 90

giving you enough for 90 one-gallon plant pots

spray stakes misters and sprinklers while 140 mesh filters are recommended for fogging applications

Large 12" twist lid

Allows for bigger

Grodan Improved Gro-Block Media Amount:64 blocks giving you enough for 90Grodan Stonewool (rockwool) is made from molten rock spun into cotton candy like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes from one batch of wool, Grodan is unique by making different types of fibers. The purpose is to support the requirement of the plant in the different plant stages. Grodan has a tremendous capacity for absorbing nutrient solution while retaining plenty of oxygen