potatofarmer
Mame
For trees I'm growing out, I use a mix of coarse perlite and vermiculite, topped with some diatomaceous earth to weigh it down. For better trees, I upgrade to a blend of pumice and diatomaceous earth, topped with a bit of sphagnum moss to keep the shallow pot from drying out. If I ever buy an expensive tree, I'll probably shell out the money for good akadama.
I have a tree that was growing in pure sphahnum moss (the expensive stuff) also seems to have died. Or its not dead but sure taking its sweet time waking up.
Maybe its the warm winter.