Member-owned cooperative since 1978

Cold-hardy varieties and everything you need to grow them

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Organic Growers Supply
Agricultural Lime

Organic Growers Supply: Agricultural Lime

ships year-round

Aragonite

pH and Calcium

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

ships year-round

Pro Pelleted Calcitic Limestone

pH and Calcium

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

ships year-round

Wollastonite

pH and Calcium

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