Nucleus® 0-0-17 + Mg is a high-analysis fertilizer blend that provides 17% potassium, 11% sulfur and 1% supplemental magnesium.Research shows potassium with a boost from magnesium can produce a significant yield advantage. With Konduit™ Formulation Technology, Nucleus 0-0-17 + Mg provides this nutrition without the limitations of traditional blends and enhances stability, handling and application.