Kiryuzuna

What is it?

Japanese mineral substrate traditionally used for bonsai. It is a hard, porous material that provides aeration, moisture retention and drainage, while also helping maintain a stable pH in the growing medium.

💧Water retention -

💨Aeration -

🚿Drainage -

⚗️pH stabilization -

🧪Nutrient holding -

🌿Organic -

Medium-High

High

High

Hight

Medium

No

What does it do?

✅Best use for:

Bonsai - Semi-Hydro - Mineral mixes - Aroids

🔬LOPOLISBIOTECH observations

Holds moisture while maintaining air space
Improves substrate structure
Provides good drainage
Helps maintain a stable substrate environment
Can help stabilize pH
Remains structurally stable for a long time

In our experience ,pH stabilization is one of the most interesting properties of Kiryuzuna but not fully research so far.

Particle size affects its water retention and aeration, but its role in maintaining a stable growing environment is what makes it particularly valuable in our mineral mixes.

💡 Key point: Not just another structural component — its potential role in pH stabilization is one of the reasons we value it in mineral substrates.