I repotted all my citrus in 50:50 Turface/ garden soil this year and removed all the previous potting soil, lost a few minor roots in process, but within a week or two, everything started pushing new growth, big Saint Teresa bloomed and fruited for the first time. Done great. I’ve cultivated bonsai trees in the past, not citrus species, but other species such as crabapple and dwarf pomegranate, azalea, wisteria, etc, and of course had to severely root prune and top prune proportionately of course, and they all did well and were potted in bonsai soil which resembles the 50:50 Turface blend. Amazing how plants can recover from pruning with appropriate aftercare. Osmacote mixed in with my Turface by the way.