MAGNESIUM SULPHATE: Purpose in Plant Nutrition

Culture Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin about 4 years ago.

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It is an essential and serves the same purpose in the plant as iron in the human blood stream; dolomite lime has some in it; also know as Epson Salts, it can be applied at the rate of one pound per 1000 gallons of water in commercial ranges. OA84-12
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Magnesium Sulphate Comments
MAGNESIUM SULPHATE: Application as Fertilizer During the summer months apply it as a spray or powder direct to the pot, at the rate of one teaspoon each month and spread around on the medium, or, at the rate 500gr. per 454 litres of water monthly or more if weather is excessively hot and bright as it helps the plants to photosynthesize. Au87 (l)-ll 0
MAGNESIUM SULPHATE: Best Amount to Use 100 ppm. decreased the growth of cymbidiums, phalaenopsis and cattleyas; 50 ppm. is optimal for cattleyas; 25 ppm. is near optimal for cymbidiums and phalaenopsis. OA79-130; wrong; plants tolerate large amounts of MgS04. OWD 0
MAGNESIUM SULPHATE: Characteristics It is a key element, instrumental in the formation of chlorophyll and plant fiber. OA78-51It is the only mineral to appear in the chlorophyll molecule; vital to green plants for photosynthesis. AU75-47 0
MAGNESIUM SULPHATE: Epsom Salts Can be applied twice a year to cymbidiums grown in full sun in California; it aids in photosynthesis and helps the plants to withstand the heat of the bright sun. OA87-93 0
MAGNESIUM SULPHATE: Optimal Amount to Apply 25ppm, which is low, can be applied to cymbidiums and phalaenopsis. SA85Dec-168 0
MAGNESIUM SULPHATE: Supplementary Fertilizer One teasoon spread around the top of an average sized pot is sufficient in the summer months; it can also be applied as a spray, Au87 0

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