Grodan PRO Delta 6.5 Unwrapped, 4" - Case of 36

Grodan PRO Delta Gro-Blocks Grodan PRO Delta Gro-Blocks come unwrapped and ready to go! Grodan Delta is the basis for an easy to steer the propagation process, which results in uniform, good quality plants. Each block guarantees uniform water and nutrient distribution. Grodan Delta scores high in saturation and firmness, which means it always performs well in highly mechanized propagation processes. What is Rockwool? 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 for rapid plant growth. Grodan comes in graduated sizes. Seedlings started in cubes are easily transferred to