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Japanese Akadama, Small, 3-5mm

37 reviews
9 items left


  1. Consistent particle size = 3 ~ 5mm
  2. High quality Ibaraki brand akadama
  3. Hard type (retains shape longest)
  4. Promotes exceptional, healthy growth.
  5. Great for rooting all forms of cuttings.
  6. Exclusively imported from Japan by Bonsai Tree.
  7. Available in 2L bag, 5L bag and 14L bags.


Akadama is a granular volcanic clay-like (although it is not clay) mineral which occurs naturally in Japan. It has been extensively used by Japanese gardeners and bonsai artists for many centuries as a growing medium for bonsai trees and other container-grown plants. It is mined from the surface of the ground, after which it is graded and packaged. Unlike LECA it is not fired at high temperatures however when it is mined from greater depths it tends to be harder or it might be slightly baked. It has many unique qualities, one of which is that when it is wet it has a darker colour so indicates when watering is needed. Akadama is unique as a growing medium and is sought after due to its ability for water retention and nutrients due to its high CEC value. However at the same time it provides porosity and free drainage.


Do not mix Akadama with organic material.

  1. This small (3~5mm) particle size akadama is suited to most tree sizes although fine particle size is better suited to mame and shohin.
  2. Akadama can be combined with other elements such as crushed stone or for best effect use pumice.

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.

See other sizes of akadama available from us

Customer Reviews
5.0 Based on 37 Reviews
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Filter Reviews:
    Susanne G.
    South Africa South Africa
    The best

    will re-pot all my bonsai into this medium - mixed with pumice of course Service is out of this world too!

    Jacque O.
    South Africa South Africa
    Fit for purpose

    I use the product in a way it was not intended. I use it in Shrimp tanks and it works perfectly for what I need. The product is fantastic but the service I received was even better. Best customer service ever. I loved the experience.

    Johannes O.
    South Africa South Africa

    I am using the Akadama for my Haworthias and they are doing very well in the medium. At the moment, hot summer, the smaller 5 cm pots takes about 3 days to dry out and the larger 12cm pots take about 5 days to dry out.

    Bonsai Tree

    Thanks for that valuable information Johannes. Perhaps you can add to future reviews some photos of your Haworthia you have planted in the Akadama. If you want faster drying you may want to include Pumice in equal portions to Akadama.

    Rudolf S.
    South Africa South Africa
    Quick, easy, great products

    Good quality and all round good experience.

    David K.
    South Africa South Africa
    Great product

    As always, very happy with the quality of the Akadama. As a medium to pot in it has helped change the development of my trees for the better. Thanks for the articles and insight Terry.