The discussion above does reveal the importance of one matter; the question whether or not Akadama is a good soil for Bonsai depends very much on your climate, your budget, availability of alternatives and how you use soil in the first place. 3. - Boonyarat Manakitivipart (Bonsai Boon), Temperatures range from a normal summer high of 38c to a normal winter low of -25c, in Southern Maine, USA. Whatever soil type you may prefer, make sure it is heat treated to solve any issues with diseases or pests, and therefore it is advisable newer to use any soils from the garden. I got a pallet of Akadama and Kanuma shipped over to secure my/Canberra's supplies in the the short term. For lower elevation conifer and water loving conifer, use small size mix (1/16” – 1 / 4 “). Kanuma Premium Bonsai Soil (3.2 Quart) Kanuma Premium Bonsai Soil - Ready To Use. Either for protection for cold winds or for heavy raining periods. For many species native to my area (picea, larix, abies, native acer) I am resorting to organic and sand, with about 25 percent recycled akadama/lava/whatever. A water-retentive but well-drained soil is therefore essential for my Bonsai. A Bonsai growing in broken-down Akadama won't automatically die; it would be wrong of me to state this. Pines and Junipers cannot have a complete soil-change to remove Akadama and repotting is infrequent; it stands to reason that any akadama introduced into the soil of a Pine or Juniper will become very compacted before there is an opportunity to remove it. Imported from Japan. Lava appears to contain available beneficial minerals, although I have no scientific evidence of this. Some bonsai enthusiasts prefer to make their own bonsai soil. As you have noted by now, there is no unchallenged or straightforward answer to this question. The Satsuki azalea (Rhododendron indicum) is a finicky and delicate shrub that produces vibrantly colored blooms with rich-green foliage. The soil microcosms were incubated at 30°C with shaking at 120 rpm for 21 days. May not be best to use unless it is very grainy (most sand in mixes is very fine). It's not clay, so the particles do not adhere to each other. - Colin Lewis, I haven't used Akadama on my own trees for over 10 years now; there have been occasions a client has insisted on using it for deciduous trees (that can be bare-rooted) but I always refuse to repot a coniferous species into Akadama. In Japan it rains for the month of June (Northern hemisphere) and the temperature is about 30°C; July is around 35°C with about 99% humidity. Read more about this here. Many factors come into play when trying to say anything sensible about Bonsai soil (climate, tree-species, stage of development of the tree, etc); this article generalizes some of these factors to not over-complicate the issue even further. It's parent material was derived from arc volcanics, probably andesitic in composition like those in the Cascades. The thickness of the moss layer should vary according to climate and watering habits.This soil mix has been used successfully throughout North America. 3.2 Quart Bag Kanuma is a granular Japanese Potting Medium for Acid-Loving Bonsai. We follow the repotting system recommended by all Japanese Bonsai Masters and Growers: - Morten Albek, I did tried Akadama many years ago for few of my Bonsai. My Bonsai are always stowed in a cold frame greenhouse. Newest products, latest trends and bestselling items、Terrarium Materials:Tools & Gardening, Items from Singapore, Japan, Korea, US and all over the world at highly discounted price! Kanuma and Akadama can be re-used several times, making them very economical (gently sieve them each time (removing dust) and water accordingly). (Shallow Bonsai pots have higher water tables and are naturally more water retentive, the reverse happens with deep pots and there is a tendency for the soil to dry out more quickly). Introduction to Soil. I follow that recommendation. - Colin Lewis, I live in the UK, typically the climate has highs of around 30C in the Summer and lows of -5 to -10C in the Winter. - Boonyarat Manakitivipart (Bonsai Boon), Back in the dark ages before Akadama was available in Europe I used a combination of coarse organic matter (sifted peat, pine or oak leaf mould, genuinely decomposed bark) mixed with coarse sand and a handful of turface. Old and larger conifers, once every 2-5 years. An additional problem with lava is that the surface has sharp edges that can easily damage tender roots during repotting. Now, as for what size to use it all depends on the age and size of the tree in question. - Morten Albek, No experience other than volcanic material. Following these simple instructions a perfect very open free-draining mix can be achieved - ideal for bonsai culture. - Robert Steven, Our soil recipe contains, 1 part lava rock, 1 part pumice, 1 part Akadama, ½ cup of horticultural charcoal (per 5 gallon mix), ½ cup of decompose granite (per 5 gallon mix). And understandably, they will not have reason to question its use. But as with all broken-down, airless clay-soils in Bonsai pots, drainage is poor, absorbance of water into dry akadama is poor, and the overall health of the tree as well as its vigor is greatly reduced. Inorganic Soil Components Part 2 Akadama Akadama is a volcanic soil - it is composed of partially to completely altered tephra deposits of volcanic ash and pumice. That's why I add volcanic cinder, adsorbent and pine fir to the mix to help hold more of the moisture. 10$ Also available in larger quantities of 3L -25$ and 5 L- 40$ Also have specialized bonsai mix If interested. Denmark is a country with a proud gardening history and a well developed greenhouse tradition, which has contributed with a lot of research and development bringing forward the best soil mixtures for container growing i.e. We are starting junipers and black pine, and seems they are growing well with volcanic soil, so we are not considering others. It is kitty litter. 5mm kanuma soil. Note : Proper repotting technique needs to be applied, otherwise this mix is not recommended. One does not have to make the soil issue complicated. I have used lava a lot, and I am impressed by the results I have seen with newly collected plants. Very strong healthy growth and good flower production have been recorded to date. One misunderstanding that many enthusiasts seem to have is that although Akadama has been used for many years in Japan; this is not because it is the 'best' soil for Bonsai. Medium Kanuma is a Japanese soil that is a volcanic soil from the Kanuma region in Japan. The cheaper grades break down more quickly than the better grades, and the surface breaks down quicker than lower in the pot, but it still drains well and performs as it should. These two ‘soils’ are in fact Pumice and have excellent properties for plant growth. They are light and therefore easier for pot handling, but most importantly they have the following useful properties: 1. Incredible shopping paradise! ETBE degrada- Would this mix do as a substitute? I also use recycled Akadama as a partial ingredient in general purpose soils. Hard Premium Akadama Bonsai Soil. How to Repot a Satsuki Azalea Kanuma. Large particles produce heavy root and heavy top growth while fine particles produce fine roots and fine top growth - important for pines in particular and any bonsai once the basic structure is established. The Japanese climate, and their lacking availability of other soil types makes akadama their choice. Please support you local resellers . - Boonyarat Manakitivipart (Bonsai Boon), I think many people repot their trees too often - three years should be the minimum period between each repotting. Hopefully enough information for you to decide for yourself what's best for your trees! I am now stocking both Akadama and Kanuma for sale in Sydney, I can ship individual to most locations up and down the east cost reasonably cost effectively. Imported from Japan. Shohin Bonsai gets a mixture with up to 80 percent soil, and 20 percent drainage pebbles or small stones like lava pebbles.For large trees that doesn't want a free draining soil, a app. It’s often a hobby people pick up to get in touch with nature if not themselves. 10$ Also available in larger quantities of 3L -25$ and 5 L- 40$ Also have specialized bonsai mix If interested. This I mix with pebbles of Leca or lava e.g. Surface texture, water retention and drainage are all near optimum, although roots still can't penetrate the grains. - Morten Albek, We are truly tropical with only warm and raining season; and we are mostly working deciduous trees, not much on conifers. But I firmly believe, as do an increasing number of people over the past decade, that Akadama does not realize the true potential, health and vigor of a Bonsai or in many cases, is the underlying cause of weakness, susceptibility to fungal or insect attack or even death (in irregularly repotted trees). 家庭園芸の鉢土やプランターの土として多用される赤玉土のような土質の土を安定して確保出来るようにする。 - 特許庁 We have an average _total_ snowfall of 2.5 meters. All available at good garden centers. Climate does not affect my choice of soils since I can control watering during hot dry weather and it never rains so much for so long that excess water becomes a problem. to adjust transpiration and drainage. Bonsai is a hobby that anyone can enjoy. - Harry Harrington, I use sphagnum peat for trees loving an acid soil (like Azalea, which loves this soil), and alkaline basic nursery soils for other trees. Orchids: Kanuma 6 parts, Matured pine fines (leaf mould) 2 parts, Coarse River Sand 2 parts. Or: (2) Akadama 8 parts, CRS 2 parts. Akadama (赤玉土, akadamatsuchi, red ball earth) is a naturally occurring, granular clay-like mineral used as As I don't consider myself an expert at Bonsai soil, but do like to be able to provide my website visitors with an answer, I decided to ask a few people that I personally consider experts at Bonsai. (Ordinary peat repels water if it dries out in the mix.) Zelkova/Elms: Akadama 8 parts, CRS 2 parts. - Harry Harrington, Not using akadama is because it easily breaks down in freezing periods. - Morten Albek, I believe Akadama is good, but just not better than our volcanic soil. British Bonsai : Bonsai Soil Multi Buys - Bonsai Tools Gift Certificates Bonsai Consumables Fertilisers & Additives Bonsai Books Bonsai Starter Sets Indoor Bonsai Outdoor Bonsai Bonsai as Gifts Suiseki Bonsai Watering Sourcing Bonsai Greetings Cards Free Bonsai Ebook Additional Shipping Vouchers Bonsai Training Wire Bonsai Soils Corporate Gifts Bonsai Pots Bug, Pest & Weed Control … Asked them about Akadama, and will be very compact and poor oxygen! Is very expensive with the fresh mosses used for Bonsai culture tested are... Manufacturers recommend using at no more no more nor less than the European average the proportions of organic potting... Summer we have cold fog coming in from the Kanuma ( for Azaleas I... A thin layer of coarsely screened new Zealand Sphagnum moss 1 part the use of and! But it 's not clay, so the particles do not use Akadama for maples... Allow air to be confused with the chopstick as this will break down and begin kanuma soil substitute! 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