kompik

I've heard good explainations as to why lava rock (pumice) is such a good inorganic soil component for bonsai, but many people recommend turface and/or chicken grit instead. I was wondering if one is better than the other in certain applications, or if they are just easier to find and an acceptable substitute. In other words, if I had my pick of any inorganic, would I always pick lava rock? If not, please list some specific applications where other inorganics would be better.

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