Gardenia is one of the important indoor plants in the flower market. This study was conducted to evaluate the effect of different concentrations of cycocel (0, 1500, 3000, and 4500 ppm) on vegetative growth, flowering and pigments content of Gardenia jasminoides J. Ellis plant. Treatment with high concentrations of cycocel (4500ppm) led to a significant decrease in plant height and a reduction of fresh and dry weight, while it increased branching in contrast to low concentrations and control. Moreover, spraying with cycocel at rates of 4500 and 3000 ppm enhanced early flowering. The highest values of number of flowers were especially by spraying plants with 4500 ppm of cycocel, followed by plants treated with cycocel at a rate of 3000 ppm. Accordingly, the highest value of fresh and dry weights of flowers was due to treatment with cycocel moderate rate of 3000 ppm. Furthermore, the contents of chlorophyll and carotenoids were upgraded in plants sprayed with cycocel at all concentrations used.