1 Gallon 3/16ths Inch Monto Clay pH 5.6 (Montmorillonite Calcined Clay) Bonsai Soil Amendment (4 Dry Quarts)
$26.49
NOTICE: The particle size of this product has changed as of 7-8-2025.
Monto Clay has a new grade. Monto Clay was screened between 1/8″ and 3/8″. As of today, it will be screened between 1/8″ and 1/4″, with larger particles removed. The result will resemble a blend between Turface MVP and the original Monto Clay.
Why the change?
The mine required it. Despite using over 100 tons annually, we’re still a small player in the Montmorillonite market, and mines are less flexible than before. We hope to return to a straight 1/4″ grade soon.
Monto Clay ®, short for Montmorillonite clay, is a fired clay product used to amend soil. Montmorillonite is sold under other brand names such as Turface MVP®.
The advantage of Monto Clay is the particle size. Larger particles help prevent dry spots, poor drainage and settling which can create acidic shock. Ideal for use in bonsai soil, cactus soil, succulent soil, hydroponics and amending soil to increase drainage.
Montmorillonite is known for its cation exchange capacity(CEC). It’s also a great acidifier. The acidic properties help offset the alkaline properties of other ingredients such as pumice and lava rock. Monto clay is a great substitute for Akadama.
Condition: Screened, Tumbled, Dried and Bagged.
- Similar properties of hard Akadama.
- Uniform Particle size prevents dry spots, poor drainage and settling.
- Acidifying soil amendment
- Pathogen free high fired clay
- Available in 2 Quart, 1 Gallon, 2 Gallon, 3 Gallon, 6 Gallon, 12 Gallon and 24 Gallon SKUs
Monto Clay® comes from the same company, mine and processing plant as Turface®. It’s the exact same product, only larger.
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.
Click the Additional Information tab for more details.
