PK-TS with its high content in Sulphur and Potassium is particularly suitable for achieving a good fruits ripening. PK-TS improves colour and texture of the fruits that become well pigmented and more resistant to transit damages keeping a good storability. Sulphur, contained as S2O3, ensures a full nourishment (SO4 readily available to the plant, and S, elemental sulphur, absorbed more slowly and leaching resistant) and induces chemical reactions of reduction for those nutrients “locked up” in the soil in their oxidized form. The fungistatic effect of sulphur makes PK-TS a formulation which gives healthier, better nourished crops.