Nutrients and Supplements

"Fertilizers and Supplements" covers organic and mineral NPK formulas, secondary macronutrients (Ca, Mg, S), micronutrients (Fe, Mn, Zn, etc.) and specialized supplements such as Ca/Mg, chelates, silicon, humic/fulvic acids and enzymes - for stable growth, flowering and high stress tolerance. NPK are the main macronutrients; Ca, Mg and S are secondary macronutrients; micronutrients are needed in small doses, but are critical for metabolism.