Akadama 3 bags for 23.99 — Regular price $23.99 Pumice 3 bags at 23.99 — Regular price $23.99 Kanuma — Regular price $8.99 Akadama is the ideal soil component for bonsai. As the roots colonize the pot they grow into the akadama and that extra moisture retention from the broken down akadama is a good thing. Here is three different grades of Akadama soil. Alpine wild plants: Kanuma soil 4, Kiryu sand 3, Pumice 3 Montane wild plants: Akadama soil 3, Kanuma soil 3, Kiryu sand 2, Pumice 2 Wild meadow plants: Akadama soil 5, Kanuma soil 2, Kiryu sand 2, Pumice 1 Seramis – Is orange fired clay that is similar to Akadama and Kanuma. Our company takes full advantage of our 48 year track records and experience as a gardening soil company in Kanuma, Tochigi prefecture. I was thinking of mixing some soil, pumice, kanuma and maybe some vulcanic rock. Double Red Line brand of Akadama is the most well known brand. It's for Ficus Microcarpa and Myrsine trees. Akadama (brown) is slightly acidic, Kanuma (yellow) - more. Even akadama is hard to get. Is it fine to use kanuma instead of akadama in my soil mix? Also, with the adsorbent it really holds a lot of moisture and when it evaporates it goes into the roots. Purists in the art of bonsai will tell you that growing trees in kanuma and akadama is the only way to go and that if you are not using this product, you are not really doing right by your trees. Akadama is an andisol (andosols) or andic soil. They will grow fine in akadama, they will grow fine in Kanuma, they will grow well in pumice they grow well in bark mixes. Akadama soil is mined in Japan from volcanic soil. Plus akadama's ability for the roots to grow through means that more of the space in the pot is available for root growth. Kanuma is less widely available in North America than akadama. Most will use akadama as it is slightly easier to get and slightly cheaper too. The trees are inside. I use two part Akadama/Kanuma, one part volcanic cinder, one part adsorbent and one part pine fir. I've been using Akadama (and Kanuma for Azaleas) as a mix for a while now. It is very stable and will last for about 2 years. The qualities of both substrates seem to be similar to pumice. Spruce are not that fussy about soil. I find with this combination I have really good drainage. I know that kanuma has higher acidity than akadama. Both Akadama and Kanuma substrates are mostly used for bonsai in these parts of the world. Since establishing this company, we are dedicated to working hard to mine, produce, and sell high-quality soil products which always satisfy our customers. Once extracted its dried and sifted to various grain sizes. We provide Akadama soil, Kanuma soil, Kiryu sand, pumice stone(for Bonsai). Each particle has a lot of small holes that retain a lot of moister. 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