Grodan Improved Gro-Block Media Amount:64 blocks California Teaching Greenhouse Package Includes:

California Teaching Greenhouse Package Includes:

Since the bin is sealed

Seedlings or cuttings started in the Grodan cubes can also be transplanted into more traditional planters and growing mediums

Depth: 1-1/2"

giving you enough for 90 one-gallon plant pots

Grodan Improved Gro-Block Media Amount:64 blocks California Teaching Greenhouse Package Includes:Grodan 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