Black Lava Rock 1/4" – Bonsai Soil Aggregate

Boost Drainage & Root Oxygen with Clean, Natural Black Lava Rock

Black Lava Rock plays a vital role in creating a healthy bonsai soil mix by improving both airflow and drainage at the root zone. Its naturally porous structure helps deliver oxygen to your tree’s roots, which is essential for maintaining strong root development and overall bonsai health.

That same porosity also supports fast, efficient drainage, helping prevent soggy soil conditions and reducing the risk of root rot—especially during long rainy seasons or frequent watering routines.

Each batch is double sifted to remove excess small particles, giving you a clean, consistent aggregate that performs well in bonsai soil mixes and other container-grown plant blends.

Key Features

• 1/4 inch particle size

• Available in 2 Quart and 20 Quart bags

• Double sifted for consistency and better drainage

• 100% natural — no chemicals, fertilizers, or pesticides

• Great for bonsai soil mixes, succulent/cactus blends, and tropical plant mixes

• Safe for use as a natural aquarium substrate

If you’re looking for a long-lasting soil component that improves structure and keeps roots healthier, Black Lava Rock is a must-have.