In this study, the influence of four different sulfur products applied to the soil on the organically grown greenhouse tomato was investigated. The sulfur treatments were: (1) micronized-sulfur with bentonite (MSB) alone (90% sulfur + 10% bentonite); (2) MSB + Fe (87% sulfur + 10% bentonite + 3% Fe); (3) MSB + Zn (87% sulfur + 10% bentonite + 3% Zn); (4) MSB + Fe + Zn (86% sulfur + 10% bentonite + 2% Fe + 2% Zn) and (5) control without sulfur treatment. The effects of sulfur products on plant growth, total crop yield, some fruit quality parameters, Fe and Zn content of the leaves and soil, pH and electrical conductivity (EC) of soil, were investigated. Results showed that the effects of treatments on plant growth parameters and fruit quality properties were not significant. However, total ...