Pumice (Hyuga) Imported from Japan. It has great aeration, drainage, and good water retention qualities. Works well with Akadama for a bonsai soil mix. Pumice is ideal for plant health. It Promotes Excellent Drainage & Water Retention, Maintains Moisture While Allowing Air Into the Roots

All Natural: 100% Pure Volcanic Pumice – NO Artificial Coloring, NO Dyes, NO Chemicals.