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GYPSUM: Supply of Calcium

Culture Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin almost 9 years ago.

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It is not highly alkaline, is available as a powder which should be useful in a tight potting mix but will wash out of a loose or open mix; pellets of it can be made by mixing Plaster of Paris with water, spread out as a thin paste to dry and then broken into flakes for adding to the mix. OIE85Jy-13
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GYPSUM: As Top Dressing It can be beneficial for cymbidiums where the water supply has too much sodium; it adds calcium. OD76-122 0

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