Enjoy complete control over plant growth and nutrient systems with Grodan Starter Plugs. These Starter Plugs are made from molten rock spun into cotton candy-like fibers and then compressed into blocks. The purpose of this design 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 sheets of 98 plugs. Seedlings started in plugs 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. Ideal for starting seeds and cuttings before transferring to Net Pots for Hydroponic Systems. 98 starter plugs per sheet. Designed for seed and cutting propagation prior to "blocking on" into larger growing blocks.