This work was carried out to determine the effect of plant growth stimulants on the fruiting of tomato plant Lycopersicon esculentum cv. Miguel Pereira. In this trial Cytozyme (biostimulant composed of kinetin, enzimes, micronutrients: Zn, Fe, Cu, Mn, Bo, combined with derivatives of siloxane-etoxil ate and amino acids) and Ergostim (N-acetyl-thiazolidin-4-carboxilic acid plus folic acid) were sprayed as follows: Cytozyme at 5ml/l was sprayed once at 70 days; twice, one at 70 and other 8% days after planting. Ergostim at 1,5 ml/l was sprayed once on the flowers of each cluster, and Ergostim at 3,0 ml/l was sprayed three times, in the flowering, in the time of fruit set of the 2nd cluster and when fruits attained one half of their development. It was verified that Cytozyme 5 ml/l applied 70 and 84 days after planting, increased the number and the length of the fruits and the total number of flowers. Ergostim did affect neither flowering and fruiting of tomato plant nor the formation and germination of seeds.