The main purpose of this study is to analyze the impact of different irrigation regimes on the background of four fertilizing levels on the irrigation water productivity of tomatoes, greenhouse production. To achieve the goal in the period 2016-2017 years, an experience with tomatoes, greenhouse production at the Maritza Vegetable Culture Institute in Plovdiv, Bulgaria was presented. The experiment is based on the hybrid vine variety "Vitelio". The experience is based on the block method on a flat surface according to scheme 110 + 50 + 35 with the size of the plot of 10 m2. Irrigation was carried out by a drip irrigation system with built-in droplets of 0.10 cm. In the first experimental year, 33 irrigations with an irrigation rate of 495 m3 / da were delivered. The irrigation rate in the second year is 405 m3 / da, realized through 27 irrigation. The main fertilization method is laid down for all variants with P23 (in the form of P2O5 and K25 (as K2SO4).) Vegetation feeding is carried out with N50 (in the form of NH4NO3) and K66 (in the form of KNO3) was carried out at 50%, 75% and 100% of the fertilizer standards. The influence of the conditionally permanent water deficit, realized by feeding irrigation norm with 50% and 75% of the optimal norm and the influence of the optimal water supply of the plants on the yields of tomatoes, greenhouse production, has been studied. There was an upward trend in the efficiency of irrigation water by reducing the consumption of irrigation water. With increasing water availability to the plants is reduced productivity of irrigation water, the most pronounced in the embodiments irrigated with 100% irrigation rate. In the conditions of water deficit and expensive water for irrigation, the information gathered shows that it is possible to apply a reduction in irrigation regulations.