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Japanese Pumice (Hyuga), Small, 3-6mm

62 reviews
4 items left

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:

  1. water retention
  2. nutrients
  3. 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.

If I had only one soil component to use for bonsai it would be 100% pumice. If you have akadama, add some. - Michael Hagedorn

As Hyuga will not under normal circumstances break down it can be sifted and re-used however if you intend doing 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 which prefer more moisture you can double the quantity of akadama.
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    Bonsai Tree Japanese Pumice (Hyuga), Small, 3-6mm ReviewBonsai Tree Japanese Pumice (Hyuga), Small, 3-6mm ReviewBonsai Tree Japanese Pumice (Hyuga), Small, 3-6mm Review

    Japanese Pumice (Hyuga), Small, 3-6mm

    I am extremely impressed with the size and quality of the Pumice. I am now using this with Ibaraki Hard Akadama small,3-5mm in a 50/50 ratio to promote growth as well as prevent root rot in my succulent and Cacti collection. It works wonders with Haworthia as well as Ariocarpus, Monkey Tail Cacti and even Aeoniums. It is really worth well and gives exceptional results. Very impressed. I would definitely recommend it to anybody wanting to improve the growth rate and general health of their succulents and Cacti.

    Riaan v.
    South Africa South Africa
    Bonsai Tree Japanese Pumice (Hyuga), Small, 3-6mm Review
    I recommend this product


    I have and am a most happy and loyal customer. I have ordered almost everything from Terry. Akadama,Pumice,Lava Rock,almost his whole range of tools and many pots. Professional mix is still one of my favourites. My wife often says when I am on line oh you watching bonsai **** and then I am most likely ordering from Terry. Always a good buy. Kaneshin tools first I ordered over 2 years ago and are still in excellent condition and used often. I have yet to sharpen them as they still have there original cutting edges. In a nutshell I love everything Bonsai Tree has to offer and I am a regular customer. His blog is easy to follow and his advice is spot on.

    Steven G.
    South Africa South Africa

    Bonsai Tree

    Steven, as always such a pleasure to deal with you. We cherish your custom. May your skills and passion for bonsai continue to grow and you can always count on us to support you.

    Bonsai Tree Japanese Pumice (Hyuga), Small, 3-6mm Review

    Quality product

    I have been using this product as an additional inorganic component to my usual orchid mix- so far so good; it has improved drainage and ventilation while also holding onto additional moisture.

    Hamza H.
    South Africa South Africa

    Bonsai Tree

    Thanks for this invaluable feedback and photo too Hamza! Yes I personally have been trying the medium particles of pumice for my Tolumnia and find they really love it too. Thank you again!

    Bonsai Tree Japanese Pumice (Hyuga), Small, 3-6mm Review

    Japanese Pumice

    As always a great end to end customer experience purchasing from Bonsai Tree. I ordered Akadama, Perlite & Bonsai Boost, all my trees are happy. Bonsai Boost is by far the best out there. Hands down!

    Richard H.
    South Africa South Africa
    Bonsai Tree Japanese Pumice (Hyuga), Small, 3-6mm Review

    Japanese Pumice (Hyuga)

    Awesome product and service, exactly what I expected.

    Kosie R.
    South Africa South Africa