You are viewing all Organic Growers Supply products related to “Calcium.”

Aragonite
Mineral - Amendments and Fertilizers

From oyster shells, not pulverized rock. Aragonite is even lower than calcitic lime in magnesium, so it's the ideal choice for soils with excessive magnesium. read more

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Gypsum, pelletized
Mineral - Amendments and Fertilizers

A good source of calcium when the soil pH is already at a desired level. read more

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Micronutrients Liquid Calcium
Mineral - Amendments and Fertilizers

Calcium helps strengthen plants’ cell walls, improving crop quality, disease resistance and storage capacity. Can help prevent problems like blossom end rot and bitter pit. read more

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Pro Pelleted Calcitic Limestone
Mineral - Amendments and Fertilizers

The most common and most frequently used soil conditioner. also called Hi-Cal lime. Recommended for soils with excess magnesium. read more

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Pro Pelleted Limestone, Dolomitic Limestone Pro-Select Prill
Mineral - Amendments and Fertilizers

The least expensive liming agent. Use to sweeten soil (raise pH) and provide calcium where excess magnesium is not a problem. read more

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Wollastonite
Mineral - Amendments and Fertilizers

currently on backorder, ETA 6/14
Silicon is linked to improved yields, especially recommended for cannabis, orchard crops, cucurbits, sweet corn, grains and forage crops. Also helps build resistance to powdery mildew. read more

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