Horticultural Clay


Horticultural Clay commonly referred to as calcinated clay, calcined clay and turface. Like Akadama this clay is mined and heated treated but unlike Akadama, Horticultural Clay is heated to a much higher degree and will not break down. Horticultural Clay is relatively new to the world of Bonsai, but a quick search online will show just how highly regarded it is as an addition to Bonsai soil and sometimes as an economical substitute for Akadama. While Akadama has been used for hundreds of years if not longer in the art of Bonsai, it was locally available to Bonsai artists developing the living art form in Japan. Many Bonsai artists in North America have been searching for years for a local substitute for Akadama.

Horticultural Clay has been found to be an excellent solution, offering the same qualities as Akadama. Excellent moisture and nutrient retention, preventing soil compacting and helping aerate the root system while being PH inert. 


This Horticultural Clay is offered in both 1 and 2-pound bags and can be used as a 1:1 substitute for Akadama. 

For Tropical trees, we recommend the following mixture:

2/3 Base Substrate Mix and 1/4 Horticultural Clay

For Coniferous Species we recommend the following mixture:

1/3 Horticultural Clay, 1/3 Pumice, 1/3 Lava Rock

For Deciduous Trees we recommend the following mixture:

1/2 Horticultural Clay and 1/2 Base Substrate Mix

Customer Reviews

Based on 7 reviews
Orv Wilson (Cobourg, CA)
I purchase a starter kit plus soil and everyone was very kind and helpful

Great company to deal with and very kind people

Max Volkart (Winnipeg, CA)

Was what I ordered, came with the rest of my order. No complaints.

Brian Dick (St. Catharines, CA)

Horticultural Clay

Karen Moore (Milton, CA)
Awesome products and service.

I use these products for my succulents. Far better t han organic mixes.

Juliana Caldas (LaSalle, CA)
Amazing trees and products

Thank you! I really love my bonsai trees and the products

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