Macroplugs have a slit that allows for easy insertion of a cutting or bare-root plant. These round plugs fit perfectly into Gro-Blocks.
For best results with these Macroplugs always insert them in the Grodan Gro-Smart tray. The individual cells will make sure that the plugs stay closed around the stem of your cutting.
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 blocks and then onto slabs, if desired. Seedlings or cuttings started in the Grodan cubes can also be transplanted into more traditional planters and growing mediums.