Boon Bonsai Soil Mix "Boon Mix"

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SuperFly Bonsai's Boon Mix

This mix is the most commonly used and accepted mix by bonsai professionals around the world. Here in the United States it is known as "Boon Mix" after Boon Manakitivipart who pushed the mix to promote better bonsai tree health in America.  Some also refer to it (in the northeast) as "Franks Mix". 

Is It Dirt?
No. Bonsai trees do not like "dirt" and will in most cases die if left in dirt over long periods of time. This is substrate.

What Is In It?
The primary components are Akadama, Pumice and Black Lava. We also added a bit of Horticultural Charcoal and Decomposed Granite. These components have been found over time to provide the best drainage, water retention, nutrient retention and air circulation possible to promote healthy bonsai.

1/3 Japanese Hard Akadama - is a clay like component that is excellent at retaining water.  It also is the only substrate in this mix that breaks down allowing roots to grown in it's place  Akadama is the primary component that allows nutrients to bind in the soil and be used by the tree.
1/3 USA Pumice - is a volcanic byproduct that is excellent at retaining water.  Retaining water is it's primary function.  Pumice can also bind some nutrients.
1/3 USA Black Lava Rock - is also a volcanic byproduct that basically is used for soil structure and for airation.
Horticultural Charcoal - was added to harbor beneficial bacteria and add humic acid in the soil.  Some say it cleans impurities, but this is likely very minimal if it happens at all.  The minimal amount added would do very little to clean impurities.
Decomposed Granite - adds weight and structure.


Particle Size
We sieve this mix to a size of 1/16" - 1/4".  This has been found to provide the best water retention, drainage and aeration for most trees.

How Do I Use It?
This is "real" bonsai soil. Be sure your bonsai pot has holes in the bottom covered by bonsai mesh.
Each micro climate may require different amounts of water. On very hot/dry days you may need to water two/three times while around freezing you may need to water every week or two. Push your finger 1" into the soil and feel for moisture. If it is dry, it is time to water.

  • Pre Mixed & Ready To Use - Sifted Prior To Bagging - 1/3 Hard Japanese Akadama - 1/3 Pumice - 1/3 USA Sourced Black Lava - A Bit of Horticultural Charcoal & Granite Added
  • Promotes Excellent Drainage & Water Retention - This mix is used by bonsai professionals around the world and has been found to drain well while holding the proper amount of moisture that bonsai need.
  • Non-Organic Mix - This mix is "real" bonsai soil and is made up of primarily non-organic components (no dirt, bark, mulch, etc.). This is really substrate. This has been found to provide optimal drainage, water retention, nutrient uptake and air to the roots (which they love).
  • Easy Zip Resealable Bag (1.25q and 2.5q bags) - Simply tear off the top then reseal the easy to close resealable bag over and over until you are ready to re-order soil.
  • 100% Money Back Guarantee - If you are not 100% happy with this product, we will refund you in full.

Customer Reviews

Based on 50 reviews
Love the different pre-mix options
Looks great


Ask a Question
  • How big of a pot will 6 quarts fill?

    6 quarts is about 1.5 gallons.

    It will fill a pot that is about 12 x 12 x 2.5"

  • I got this for my bonsia and I have a few succulents can I use this soil. Thank you

    This will work great for succulents.  Please keep in mind it may be very different than your current suculent mix.  I have a specialty high end succulent grower that uses almost this exact mix for his little succulents that go for $100+ each.  He waters once per week, but said the type he has can go up to a month.

If you are not 100% satisfied with your purchase from Superfly Bonsai, simply visit our returns center to get started.  Items must be returned at your expense.  If you beleive that we messed up somehow please let us know and we will evaluate the situation on a case by case basis.  When a return is authorized simply send the product back in sellable condition for a full refund of the product price.

Visit our Returns Center to start a return.

We utilize several different carriers to provide accurate shipping rates. Rates are calculated by distance, weight and package dimensions. A custom shipping quote will be provided in the shipping section during checkout.

How Long Does It Take To Ship?
In most cases we ship the same or following business day.  During peak season (March - May) it could take a day or two longer, especially for orders placed after noon on Fridays.  We do our best to geat all orders out as fast as possible.

How Long Will It Take To Get Here?
If you are paying for your own shipping, the amount of days will be listed when you choose your shipping preference at checkout.  If you reached our Free Shipping Minimum, we will ship the lowest cost method.  This usually takes 1-5 business days plus our handling time of 1-2 business days.  An email will be sent when your order ships with tracking information.

Free Shipping
Superfly Bonsai currently offers Free Shipping for All Retail orders over $99.00

Plants & Tree Shipping:
We ship bonsai trees and plants from either our parnter nursery or our in house nursery depending on the tree.  We may limit when we ship trees to help limit their exposure to extreme environments.  For example we may not ship if it will cause the tree to sit in a truck over a weekend or holiday in very low temperatures or very high temps.

If we are shipping from our Harrisburg, PA location, the tree may arrive via any carrier, but usually UPS or USPS.  Time in transit will be 1-2 days in the northeast, 2-3 days in the southeast, 3-4 days in the midwest and usually 5 days for the west coast.

Trees are shipped in custom boxes made just for shipping trees.  Sometimes we wrap the pot and soil in plastic to prevent it from spilling out in transit.  Many times we use packing peanuts as they have proven to be very reliable in keeping trees safe in shipping.  If a box is noticiably damaged, please take pictures prior to opening.

Please Note:  We do not ship plants and trees to California

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