Black|Red Lava Rock (Horticulture grade) 1/2 pound (.4 liters)

Lava Rock is used as a soil additive or top dressing in the art of bonsai. It also is used with succulents, cacti and tropical plants! As a much better alternative to soil. Perfect for improving drainage and reducing root rot, lava rocks can be added into the soil or used as a top dressing for your potted plants.
Grain size 3-7 mm