premium Japanese Soil

Lava Rock Soil (1–3mm, 6–6mm, 6–9mm) is a porous, mineral-rich substrate designed to maximise drainage and long-term soil stability. Its rugged structure prevents compaction, allowing consistent airflow to the roots while supporting efficient water movement through the pot. Highly durable and pH-neutral, it doesn’t break down easily, making it ideal for maintaining structure in bonsai soil mixes over time. Perfect for growers looking to build a resilient, well-balanced growing medium.