Humboldt Nutrients Calyx Magnum, 1 gal HNCM410 | Humboldt Nutrients

With an available 2% (N), 3.4% (Ca), and 1.4% (Mg) + micronutrients, Calyx Magnum gives gardeners vital nutrients needed for plant development and growth. Another huge benefit is that we created Calyx Magnum without the use of chemical chelates like ED