Kanuma 3 to 6 mm - Bonsai Substrate - 1.5 Lt

The 3 to 6 mm caliber is the most used in most Bonsai, whether pure or combined with other components to make specific substrates.


Originating from the Kanuma area (azalea soil in Japan), its main characteristic is having an acidic P.H. and maintaining this acidity for a long period (unlike peat, which is also acidic but becomes neutralized (alkalized) with watering). This characteristic is due to the fact that Kanuma is acidic due to thermal demineralization, which reduces its alkalizing capacity, ensuring acidity throughout the interval between repotting.

This soil is ideal to be used pure (or in a very high percentage combined with other components) for azaleas, rhododendrons, and all species that require acidic pH.

In areas with calcareous water (such as in southern Portugal), or when the watering water is alkaline, or in species that, while not acidophilic, prefer slightly acidic soils (bougainvillea, citrus, etc.), we can add a percentage (10 to 15%) to the leafy mixture to facilitate nutrient uptake and prevent chlorosis (such as iron chlorosis—iron deficiency).