The Orchid Doctor Articles under the Heading Superphosphate

Superphosphate Comments
SUPERPHOSPHATE: A Fertilizer On cymbidiums and cattleyas use a heaping teaspoon spread evenly over a 10-inch pot surface, or half that for an eight-inch pot of a cymbidium; for cattleyas use five level teaspoons in five gals, water, stir and let stand overnight, apply one or two cups per plant. A63-303 0
SUPERPHOSPHATE: What Is It? It is the end product obtained when rock phosphate is mixed with sulphuric acid but not phosphoric acid; it contains about 16 to 20% of P205 (means soluble phosphate), A61-981; single super-phosphate has an analysis of 0-20-0; used as a dry feed on cymbidiums. A68-1058; OWD 0

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