Hydroton Grow Rocks 50L Bag

Grow Rocks are Dutch-made premium LECA (lightweight expanded clay aggregate). These are the top choice for both hydroponics and horticulture applications by Dutch growers. They have a strong pebble structure and don't crush easily. These are the preferred growing media for aeroflos, waterfarms and net pots. Grow Rocks can be used for decorative purposes, soil aeration, drainage, hydroculture and hydroponics. Pebble size is 8-16mm.