Lightweight expanded clay aggregate pebbles have wicking properties that make them an excellent medium for growing plants hydroponically or for use as a component in a soil mix. With two available sizes, our clay pebbles will meet the needs of small, medium and large plants alike. Clay pebbles are also commonly used as a drainage layer for terrariums and our clay pebbles, being darker and less uniform than some other brands, makes for a more pleasing aesthetic when used for this purpose Clay pebbles are nearly half the density of calcined clay and about the same density as horticultural charcoal, making it an ideal substrate option for drainage layers. We recommend covering clay pebbles with a material such as horticultural fabric or synthetic screening to prevent smaller-grained substrate materials from filtering down.
