3.5 Gallons BonsaiJack Organic Bonsai Soil Mix 221 (14 Dry Quarts)

U$D 34.29

Organic Bonsai Soil Mix 221

  • Ingredients: 40% Pumice, 40% Bonsai Block(calcined clay), 20% Pine Bark Fines. All 1/4 Inch.
  • pH: 6.4
  • Absorption Rate: .077 ounces per cubic inch
  • Evaporation Rate: 53.24% over 24 hours. 81.8% over 48 hours.
  • Re-water Days: 1-2
  • Bulk Density: .273 ounces per cubic inch
  • Particle Size: ¼ Inch
  • Minimum Size: 1/8th
  • Maximum Size: 3/8ths
  • Application: Universal mix for trees that are repotted once every 1-4 years.


Our proprietary soil mixes are a result of lab testing more than 100 potting soil blends and aggregates. Bonsai Jack bonsai soil mixes are optimized for pH, water absorption, evaporation, bulk density and particle size.

The soil mixes absorb a good volume of water and release more than half it over 24 hours. More than 80 percent of the water is released over 48 hours. This helps prevent wet feet and optimizes the wet / dry root cycle.

We understand the importance of trusted and safe bonsai soil mixes for your prized bonsai. Our bonsai soil products are backed by real science. You will not find us making claims such as "pH neutral". We do not use fuzzy math(measuring with cups, dry quarts or nursery pots) when measuring soil for packaging. Our soil mixes are not simply created by throwing infested soil ingredients into a bucket. We source and process bonsai soils with professional standards.


Did you know?

All of our soil products are state inspected and tested on a regular basis in order to comply with multi-state regulations.
This ensures you receive material free of dangerous pathogens that can damage or kill plants. This is also required to maintain six nursery stamps that allow us to ship to all 50 states.


Play it safe when handling organic material

  1. Wear latex gloves and wash hands
  2. Use an n95 mask when dust particles are present. Gearson 2130 N95 masks can be purchased for about 20 cents each. We provide these masks free of charge, simply call or email.
  3. Never handle organic material with open wounds. Rubber gloves are available at no charge, please call or email.
  4. Avoid cross contaminating soil by cleaning your tools with a bleach solution. 6 parts water to 1 part bleach.


Click the Additional Information tab for more details.


GTIN 00857206008022 SKU: 857206008022 Category:

Additional information

Weight 19 lbs
Dimensions 10 × 20 × 5 in

A blend of brown, white and earth tones.

Raw Material

Calcined clay, pine bark and horticulture pumice.

Average Particle Size

1/4 Inch

Minimum Particle Size

1/8th Inch

Maximum Particle Size

3/8ths Inch


Bonsai Jack LLC

Country of Origin(COO)

Made in USA of U.S. and imported substrate.


3.5, Dry

Cubic Inches


Cubic Feet



One 3.5 Gallon Bag



Plant Type

Universal Bonsai Soil Blend. Works well for tropicals such as Brazilian Raintree, Ficus, Neea and Fukien tea.


Dye-free. We comply with State laws which require products containing pine bark to be treated with a Bifenthrin drench. This helps prevent the spread of invasive species and provides some residual pathogen control for your plant.

Other Applications

Potted plants that prefer a fast draining soil with a similar pH.

Bulk Density

.273 ounces per cubic inch

Conversations ...

  1. Question

    taylor.hwt (verified owner)

    Recently received your organic universal soil mix, as I wanted to transplant a fukien tea from a plastic started pot to a bonsai pot. I quickly but careflly removed the soil from the roots, I did almost no trimming of roots, and repotted plant using the bonsai soil mix. I did not defoliate. The leaves are drooping/wilting. I am keeping the soil wet/moist and keeping out of direct sunlight. I moved it from the screened lanai to inside. I am in Fort Myers and the last few days have been windy with cooler nights.
    Is there something else I should be doing or could be doing. The fukien tea came from a 10″ pot and is about 14′ tall (really horizontal as it is a cascade.)
    Howie Taylor

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    • Staff Bonsai Jack

      Hello Howie,
      The 221 mix organic mix you have works well with Fukien in Ft Myers. I have never repotted a Fukien this early in the season. Some people will. I prefer to repot during the hottest months. This could explain the plant stress you are seeing. You want to be sure the soil is not kept too moist. The root need time to dry out between watering. We water our Fukien in Ft Myers every 48 hours during the cooler months and the roots are well established. They are watered once a day in the hottest months.
      I hope this helps. I cannot offer a ton of advice without seeing the tree and root system. You may want to try Wigerts for expert advice. They are a full service nursery located in North Ft Myers. They even offer boarding services for sick plants.

      Have a great week


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    • taylor.hwt (verified owner)

      thank you

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  2. Question

    Greg Potteiger

    I want to plant 1 gallon Japanese maples in containers, not for bonsai. I was going to mix this with a quality potting soil. Do you have any recommendations or thoughts on this? What ratio would you recommend? Thanks

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    • Bonsai Jack (verified owner)

      Thanks for the message. If you are growing it as a houseplant traditional potting soil will work fine. Gritty mix is designed to support large plant breeds in shallow containers. If the roots are free to grow you can use a high quality potting soil.

      Have a great week. Please call or email if you have questions or concerns.

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