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Calcium sulfate improves the structure of heavy clay soils while adding available calium and sulfur. Gypsum also helps remove any sodium build up from the breakdown of organic matter. This product is a naturally mined mineral, pelletized with a small amount of molasses. An excellent source of calcium. No effect on soil pH. Contains 12% sulfur Best applied before planting and/or before flowering for best results. 1/2 - 1 cup per cubic foot of soil as part of a complete nutrient and mineral program.
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