N, P, and K receive a great deal of fanfare for their broad role in promoting crop growth and yield. But in more specialized crops, like potatoes and fruit, quality is a factor of equal or greater importance to total yield and secondary macronutrients (S, Ca, and Mg) play a central role in optimizing production. Nutrient solubility, release rates over time, and crop uptake matching nutrient demands during the season is essential for quality, yield, and economic returns to the grower. Now, with Polysulphate as an innovative nutrient solution, crops can have prolonged availability of macronutrients (K, Ca, S, Mg) with low salt levels, while simultaneously meeting demands for a low carbon footprint (sustainability), versatile product for both organic and conventional production that meets potato and fruit yield/quality demands for enhanced profitability. During this presentation we will dig into the importance of secondary macronutrients in potato and fruit production, reviewing North American trials, as a component of a complete fertility program. Key points of discussion around potato size, appearance, marketable tubers, and fry/chip color; as well as cherry color, size, stem retention, firmness, sugar content and storability will be reviewed. Polysulphate is not just for potatoes and fruit but is a valuable nutritional tool for row crops (alfalfa, corn, canola, etc.).