Double Red Line Hard Akadama is a premium horticultural growing medium originating from Japan and used primarily for succulents, bonsai, and cactus as well as other plants that require good water-retaining potting mixes that drain well.

A prized growing medium, Akadama holds nutrients and water in its cavities and imperfections while still allowing good airflow and porosity. Akadama is a natural, volcanic clay-like material that has been naturally dried or baked to a specified level of hardness. Double Red Line Akadama is a hard variety of Akadama that will break down very slowly.