Roots Organics CalMag solves CalMag deficiency by supporting plants during fast growth as it is a pure and all natural blend of calcium, magnesium and sulfur. Roots Organics CalMag is a product free of added nitrogen, phosphate, and potassium, Roots Organics give you control to supplement as needed without affecting primary fertility input ratios. For incredible results, use in combination with high quality base fertilizers like Roots Organics Buddha Grow and Buddha Bloom.

• It's free of added nitrogen, phosphate and potassium
• Ideal for fast-growing and heavy feeding plants
• Derived from Kieserite, Gypsum