No one germinates in hydroton, your either going to buy Rockwool, Grow plugs, or Rapid rooters. then your going to germinate either in a paper towel that is kept dark damp and warm, or you can throw them in a cup of water. Once the tap root sticks out your going to place it in one of the afore mentioned mediums wait for it to root and then your going to stick it in your "clay rocks".