The objective of this study was to determine the level of fertilizer use and its effect on the environment. In order to determine the number of greenhouses in which the questionnaire would be conducted, the simple random sampling method was used. The number of greenhouses was found to be 138 with the confidence interval of 90 % and 10 % error. When the relations between the variables determined in this study were analyzed, it was found that the producers with a higher education level gave more importance to the soil analysis, these enterprise owners made production in larger greenhouses using more organic fertilizers, and there was a strong relation between the use of organic fertilizers and the yield. When the relations between the variables and the yield were examined, it was determined that the yield was associated mostly with the chemical fertilizers used, and performing analysis followed it. Based on these data, it was found that 28 % of the enterprise owners who were elementary school graduates had the soil analysis made, and these enterprise owners applied fertilizers at an average of 900 kg.ha(-1). These rates decrease among the enterprise owners who are high school graduates. It was found that 40 % of these enterprise owners had the soil analysis made and applied fertilizers at an average of 750 kg.ha(-1). It was found that all of the enterprise owners who were university graduates had the soil analysis made and applied fertilizers at an average of 650 kg.ha(-1). Furthermore, soil samples were taken from 10 greenhouses to determine the amount of the material present in the soil. It was found that the salinity content rate in the soil was 0.17 % on average before the beginning of the production in plastic and glass greenhouses, and it reached 0.26 % in plastic greenhouses and 0.31 % in glass greenhouses at the end of the production. The results showed that the excessive use of chemical fertilizers would pose a potential pollution risk for soil and water resources. It was observed that the unconscious fertilizer use in greenhouses in Mugla region was not on the agenda, and it was also observed that the necessary measures were not taken regarding this issue. Therefore, public and private organizations must carry out more studies in order to raise the awareness of the producers, and the issue of increasing the incentives for carrying out the soil analysis before fertilization should be implemented as soon as possible.