Muck-O Bonsai Muck Keto Soil For Making Kokedama, Kusamono and Seki-Joju (accent plants, rock plantings and moss balls)

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Muck-O is ideal for all your Kokedama (moss balls), Kusamono (accent plants) and Seki-Joju (rock plantings).  The purpose of Muck-O is to hold it's shape while providing soil for the plant you are working with.  Muck-O retains a lot of water and when used with rock planting for trees like junipers and pines, be sure to use a base of substrate then build the walls around the substrate.  This will provide additional drainage for trees that like drier roots.

Muck-O is modeled after traditional KETO-TSUCHI from Japan.  Keto is basically the dead material from the bottom of rice patties.  This muck uses Michigan Peat, Long Fiber Sphagnum Moss and Akadama.  Muck is also known as Japanese peat muck, peat clay, rise muck and peat muck.  Although recipes differ around the world, the primary necessities are drainage, moisture retention and structure retention.

When you really need to muck things up, use Muck-O

Muck-O does not ship out of the United States.

Customer Reviews

Based on 14 reviews
My first order.

Superbly Bonsai was very responsive, order was processed and shipped quickly.
Muck is the perfect blend, holds water and maintains shape. I highly recommend and will buy again.

Muck-O soil

Great mix!! Would highly recommend for rock plantings and others alike. Definitely will reorder once I finish what I have.

Bonsai Muck

Great product to make your Kokedamas with.


Waiting for the weather to turn good so I can use the Muck. we have frost on my deck so I can’t get out to where I need to build the retaining wall for my bonsai trees I think this will be an easy use just need to get to it so thanks for sending it will buy more have a good day


Great stuff, need more.


Ask a Question
  • What size is the bag?

    The 2 Pound bags are about 5" x 8" x 1.5".  A similar size as a bag of Keto from Japan.  The size of the bag can vary as it goes by weight and the bags are cut to length as needed.

  • What is Muck-o made out of. I want to make a kokodama staghorn.

    From the description:  Muck-O is modeled after traditional KETO-TSUCHI from Japan.  Keto is basically the dead material from the bottom of rice patties.  This muck uses Michigan Peat, Long Fiber Sphagnum Moss and Akadama. 


Thank you for your purchase. We hope you are happy with your items! However, if you are not completely satisfied with your purchase for any reason, you may return it to us for a full refund, store credit, or an exchange. Please see below for more information on our return policy.


All returns* must be postmarked within thirty (30) days of the purchase date. With the exception of returns for broken/damaged items, all returned items must be in new and unused condition, with all original tags and labels attached.

*Plants + Trees Returns: By purchasing a tree from us, we assume you know how to properly care for the tree. Bonsai and other plants are alive and will die if not properly cared for. We have no control over how trees are cared for once in your possession. Therefore, by purchasing this tree, you acknowledge that we, the seller, provide no warranties expressed or implied after the tree is delivered. This tree is sold "AS IS" and this sale is considered final. No refunds or exchanges will be offered after the tree is purchased. We will only ship healthy trees. We will require a signature on most trees over $100USD. If the box arrives damaged, please take pictures and make note with the shipping company prior to signing. If you sign for the package, the sale is final.


For the easiest way to process returns purchased through our website, please visit:

For items purchased through Etsy, please include the item and invoice # and return to:
Superfly Bonsai
1670 S. Cameron Street
Harrisburg, PA 17104

For items purchased through Amazon, Walmart, or eBay, please visit the vendors website. Linked below is information from each vendor to get you started.
Amazon: click here
Walmart: click here
eBay: click here

Please note, you will be responsible for all return shipping charges.* We strongly recommend that you use a trackable method to mail your return.

*Certain returns may be eligible for shipping charge reimbursement. We reserve the right to refuse refunds on shipping charges based on reasons for return.


Once we receive your item, we will inspect the condition of the items and notify you that we have received your return. We will also notify you on the status of your refund after we've inspected the item.

If your return is approved, we will initiate a refund to your original method of payment. You will receive the credit within a few business days, depending on your card issuer's policies.


If you have any questions concerning our return policy, please contact us at:

*Management reserves the right to refuse a refund, exchange or the resale of any item based on the condition of the merchandise.

Shipping Policy

Order Processing

All orders are processed within 2 to 3 business days (excluding weekends and holidays) after receiving your order confirmation email. You will receive another notification when your order has shipped.

Plants + Trees Shipping: Shipping may be delayed to prevent the tree from sitting in a warehouse over a weekend or holiday. Most trees ship Monday-Wednesday. We do not ship trees to PO, FPO, or APO boxes. We also do not ship trees out of the continental US or to California.

Domestic Shipping Rates and Estimates

For calculated shipping rates: All orders (under $99 USD or Wholesale) will be presented with shipping options that are calculated based on the item weight, box size, and distance from our shipping location.
Free Shipping: All RETAIL orders over $99.00 USD ship free within the continental USA. Free shipping will be the lowest cost option from FedEx.

In-store Pickup

You can skip the shipping fees with free local pickup at our warehouse. We are located at:
1670 S. Cameron Street
Harrisburg, PA 17104
We will send you an email when your order is ready along with instructions.
Our in-store pickup hours are 10AM-4PM Monday-Friday. Please have your order confirmation email with you when you come.

International Shipping

At this time*, we do not offer international shipping.
*Shipping to Canada and Mexico will be available at some point in the near future. Check back for updates to this section.

How do I Check the Status of my Order?

When your order has shipped, you will receive an email notification from us which will include a tracking number you can use to check its status. Please allow 48 hours for the tracking information to become available.
If you haven’t received your order within a reasonable amount of time, please contact us at with your name and order number, and we will look into it for you.

Shipping to P.O. Boxes

FedEx: FedEx will only ship to P.O. Boxes with SmartPost, which we do not offer at this time. Click here for more information.

Refunds, Returns, and Exchanges

We accept returns that are postmarked within thirty (30) days of the purchase date. With the exception of returns for broken/damaged items, all returned items must be in new and unused condition, with all original tags and labels attached.
In the event that your order arrives damaged in any way, please email us as soon as possible at with your order number and a photo of the item’s condition. We address these on a case-by-case basis but will try our best to work towards a satisfactory solution.
If you have any further questions, please don't hesitate to contact us at

Large Orders

If you are a placing a larger order (over 30 bags of soil or many pots), it may be cheaper to ship via freight truck. If you are interested in pricing for this, please contact us here.

Show Pickup

We attend 7-10 shows a year, mostly on the east coast. Please check our calendar to see if we may be attending a show close to your location, and we can arrange to bring your order for pickup at the show.

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