Clay Pellets clay pellets Clay Pellets (also known as Hydroton) is a type of growing medium, popular in hydroponic growing. The small clay balls provide great drainage and air circulation.Read more about Clay Pellets (CC BY-SA 2.5) Related Terms Growing Medium / Perlite / Vermiculite / Coco Coir / Rockwool << Back to Glossary Related Posts:Farmers are conducting trials with hemp in livestock…How to Grow a Cannabis Plant and Harvest ItHow to Get Rid of Slugs and Snails on Your Cannabis Plant