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

Aragonite
Calcium Source - Soil 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
Calcium Source - Soil Amendments and Fertilizers
A good source of calcium when the soil pH is already at a desired level. read more

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Pro Pelleted Calcitic Limestone
Calcium Source - Soil Amendments and Fertilizers
currently on backorder
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
Calcium Source - Soil 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
Calcium Source - Soil Amendments and Fertilizers
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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Micronutrients Liquid Calcium
Mineral - Soil 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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