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Roots Organics CalMag - 32oz A pure and all natural blend of calcium, magnesium, and sulfur to support plants during fast growth. By creating a product free of added Nitrogen, phosphate, and potassium, we give you control to supplement as needed without affecting primary fertility input ratios. CalMag is ideal for fast-growing and heavy feeding plants. Use in combination with a high quality base fertilizer.

Roots Organics CalMag - 32oz

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