modern substrate: baked loam (turface), pumice, 20 % rough peat. Can be lots of other things -absolutely no soil, only rough substrate.
Mr Pall, could you please share with us the benefits of repotting trees in this period of year?
I think its just a little confusing when someone with as much global respect as him does something like this without warning others.
Maybe he is just showing how much of a bonsai ninja he is.
He has the time to do it now so he did it now. He is able to provide proper aftercare so the tree will not suffer.
He who can read has advantages. I did write that I cold do it any other time within the next two years. But I chose this time because it is a very good one.