SAWDUST, REDWOOD: As Potting Media

Culture Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin almost 8 years ago.

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Excellent culture of cattleyas was obtained in redwood sawdust in a commercial grower's collection near the Californian southern border. OD69-173
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Sawdust Comments
SAWDUST: As Potting Mix To one half a cubic metre of sawdust add one half cubic meter of sand, and 2.6 kg. of Urea, 1.5 kg. of Superphosphate, 9.0 kg. of Dolomite (powdered limestone), 500gr. of Potassium sulphate, lOO gr. Copper sulphate, 30gr. Zinc sulphate, 30 gr. Manganese, 60 gr. Ferrous sulphate, 1 gr. Boric acid, and 1 gr. Ammonium molybdate. AU87-17 0
SAWDUST COMPOST: Potting Medium for Cymbidiums Mixed with fowl manure; it is successful with some growers; breaks down easily; can cause root rot; sawdust from "treated" timber may also cause root rot; fowl manure might contain elements harmful to the plant; however, a test repotting in another mix was no more successful so the mix may not be the fault. AU71-33 0

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