Many years ago, much of my business was the importation of Chinese cymbidiums from Taiwan. They typically came in 2 or 3 bulbs and a new growth, and in-spike (usually 500 at a time. I don't miss potting them all up.). They all went into 4/5" S/H pots of PrimeAgra and I hardly even lost a bud.
I don't know what Permatil is, but stalite (expanded slate or shale - I don't recall which) is not a particularly good medium in my opinion, as it packs too tightly and only absorbed about half the volume of water compared to any brand of LECA I tested.
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