The Orchid Doctor Articles under the Heading Coke

Coke Comments
COKE: As Potting Material It is 88% carbon, inert, with a sponge-like formation; sterile; proven valuable for potting; not available commercially. A61-644+ 0
COKE: As Potting Medium In gravel culture type of situation, coke as the supporting medium has advantage in its porosity, holding more solution than gravel or quartz or granite, but no better than haydite. A65-244 0

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