Notes from Mike Pistello
Soil for refined trees
Oaks—-3:1:1 (Akadama:Pumice:Lava)
Same for most broadleaf trees
Junipers—2:1:1
Soil for development trees
Early development (in colanders)—1:1:1
Advice
Would not defoliate the same year as a repot.
For a maple, should be super vigorous or young