Roots Organics CalMag - 2.5 GAL / 10 L - Case of 2Roots Organics CalMag is 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. Roots Organics CalMag is ideal for fast growing and heavy feeding plants. Use in combination with high quality base fertilizers like Roots Organics Buddha Grow and