Japanese Pumice Hyuga 3-6mm (Medium) 18L | TOOG951 – DISCONTINUED

Japanese Pumice Hyuga 3-6mm (Medium) 18L | TOOG951 – DISCONTINUED

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This naturally occurring volcanic product from the south part of Miyazaki Prefecture in Japan is commonly known as Hyuga.

SKU: TOOG951-DISCON Category:


Japanese Pumice 3-6mm (Medium) 18L | TOOG951.

What Is It?

Japanese pumice or Hyuga as it is known in Japan is a naturally occurring volcanic product from the south part of Miyazaki Prefecture in Japan.

Hyuga vs Pumice:

These two products are very similar in characteristics however due to the manner in which this Hyuga is formed in nature it is slightly softer and more porous than conventional pumice. In fact, Hyuga is so porous it will sink, which reduces erosion when watering.

Due to the porosity of Hyuga aggregates in your growing mixes it enhances:

  • water retention
  • nutrients
  • oxygen

It is suitable for a wide range of plant species as it has an essentially neutral pH of 6.

How To Use:

  • Japanese pumice is highly recommended for more demanding succulents as well as acid-loving rhododendron (including Azalea), general pot plants, orchids and it of course forms a crucial part of many bonsai growing mixes.
  • As Hyuga will not under normal circumstances break down it can be sifted and re-used however if you intend to do so a disinfecting treatment using Sporekill is strongly recommended to reduce the risk of spreading fungal or bacterial issues.
  • Hyuga can be combined with other elements such as akadama or peat (no more than 20% of the total mix). Due to the good drainage qualities of hyuga it is very often used to assist a sick tree to regain vigor and health. In such a case 100% Japanese pumice may be used.

For typical growing conditions, a ratio of 1(akadama) : 1(pumice) can be used. For plants that prefer more moisture, you can double the quantity of akadama.

Recommended Mixture:

  • 3 Parts Akadama 3 Parts Pumice 1 Part Compost/ Pine Bark.


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