How to Use Clay Pebbles in Hydroponic Gardening
How To Use Clay Pebbles. Once your system is ready, using the clay pebbles is quite simple: 1. Rinse expanded clay pebbles to remove excess dirt and debris. 2. Fill plant container with clay pebbles. 3. Sprinkle seeds over clay pebbles directly or transplant seedlings into system. You can often find that new transplants are started in rockwool. 4.