Back home (NH) the localism feed store were Blue Seal. Here in Athens its Whites Mill. I get any oyster-shell (just a little) granite chicken sratch (grani-Grit) about half. Crushed bark mulch, is most of the remainder of my soil.
Peat, potting soil (loess), does have its use in some temperate trees soil. But if they aint azalea or bald cypress, be very sparing of soil components that have tiny particle size.
My eldest describes bonsai soil as: a bag of rocks with a little bark mulch added on. I think she's about right.
I don't think you need to repot, but your beta-built soil is going to have less fines in it.
Less fines, means your screened drainage ports don't clog as fast. Soil will percolate faster and your trees will stay happier.
Think like a tree
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