Kiryuzuna 3-5 mm – substrat mineral japonez pentru bonsai, stabilitate si nutritie controlata

Kiryuzuna is a Japanese mineral soil dedicated to growing bonsai, valued for its rich mineral content and excellent ability to support a healthy root system. It ensures good retention of water and nutrients, with gradual release, while maintaining proper aeration of the roots.

It is a zeolite-type material of Japanese origin, obtained from mountain sand resulting from the breakdown of volcanic gravel. Its mineral structure makes it heavier and more stable than akadama, with slow degradation over time. The pH is slightly acidic to neutral, with values between 6.5 and 6.8, suitable for most bonsai species.

Due to its stability, kiryuzuna is used both as a complementary soil and in custom blends. Depending on the grower's experience and species, it can be used, for example, in a mix of 70% akadama and 30% kiryuzuna, for extra drainage, stability, and mineral supply.

Main features

• Japanese mineral soil, zeolite type

• high mineral content

• good retention of water and nutrients

• gradual moisture release

• efficient aeration of the root system

• greater stability compared to akadama

Chemical composition

• Silicon: 16.84%

• Aluminium: 14.52%

• Magnesium: 0.10%

• Iron: 0.83%

• Calcium: 8.47%

• Oxygen: 53.84%

• Titanium: 0.10%

• Carbon: 3.58%

• Manganese: 0.01%

• Sodium: 1.52%

• Potassium: 0.11%

• Phosphorus: 0.09%

Usage recommendations

• recommended for bonsai, especially for experienced growers

• ideal mixed with akadama, pumice, or lava

• do not compact manually in the pot

• adjust proportions according to species and climate

Additional information

• bulk product

• hand-packed in zip bags by our staff

• there may be volume differences or variations due to porosity, compaction, moisture, or material density

• these variations are normal for mineral soils