BB divisions hardly ever produce roots. They have to produce a new growth, which will then send out roots to sustain this new plant.
Thus, no matter how dry a mature plant likes to be (and most don't!), I always start BB divisions in pure spaghnum, only packed tight enough to hold the BBs upright. For taller BBs, I tie them to a stake to keep them stable in the pot.
The only exception to this would be Cymbidium. Their BB divisions go into my regular terrestrial mix, and then I water them together with my mature plants (which are never allowed to dry out).
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Kim (Fair Orchids)
Founder of SPCOP (Society to Prevention of Cruelty to Orchid People), with the goal of barring the taxonomists from tinkering with established genera!
I am neither a 'lumper' nor a 'splitter', but I refuse to re-write millions of labels.
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