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Are there any CP-friendly muck/keto/molding soil recipes that don't use clay?

For those that don't know, muck is a type is a self-adhering, clay like mud used in bonsai, kusamono, kokedama, etc. It mostly seves as a sort of molding/modeling clay for holding together mounds of actual substrate on rock slab plantings or plantings where you want to create a mound that rises above the lip of the pot. Most recipes I'm aware of use peat, LFS, and clay, but I would imagine that the minerals in the clay would not be good for CPs. I have a design idea for a dish/container bog garden that would really benefit from some muck, but I don't know of many recipes that use an inert substitute for the clay. I did find one that mentions using a corn starch slurry, but I'm not sure if it'll end up killing my plants. Any thoughts from you guys? Thanks in advance!
 
they all use clay as the binding/stability agent. You'd be hard pressed to find something without clay, or a derivative of clay - like akadama fines or similar.
 
Is that muck blended into the fine gravel substrate I've seen bonsai growing in or is it used to mold a container of sorts for the substrate to be piled in? Either way, I'd try it and see what happens, with the expectation that it'll be OK. Clays are reasonably stable minerals, other than for the incredible capacity of some to bind and release cations, and that shouldn't be a problem if you're using reasonably soft water. I would not use corn starch.
 
Is that muck blended into the fine gravel substrate I've seen bonsai growing in or is it used to mold a container of sorts for the substrate to be piled in? Either way, I'd try it and see what happens, with the expectation that it'll be OK. Clays are reasonably stable minerals, other than for the incredible capacity of some to bind and release cations, and that shouldn't be a problem if you're using reasonably soft water. I would not use corn starch.

It's both. Used to create containment walls and also to use as part of the substrate/media.
What "clay" is used matters. I mainly use fines (whats left after sifting) of my akadama. But, I've also used clay (for ceramics) depending on application/need.
 
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