Grodan Pro Delta 6.5 Block, 4" x 4" x 2.5", case of 216, Commercial reflective-and-greenhouse-films They are 100% water soluble

They are 100% water soluble formulas containing a properly balanced mixture of all essential plant nutrients with quality-enhancing elements

Pure results

Because it contains isopropyl alcohol

even under lights

200K blue spectrum for vegetative stage

Grodan Pro Delta 6.5 Block, 4" x 4" x 2.5", case of 216, Commercial reflective-and-greenhouse-films They are 100% water solubleGrodan 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