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Soil Amendments and Fertilizers (5)

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

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

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

Pro Pelleted Calcitic Limestone

Calcium Source - Soil 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

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

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