The present investigation was conducted at Faculty of Agriculture, Annamalai University, Chidambaram to study the investigation of plant growth regulators and pinching on flowering and yield parameters of African marigold (Tagetes erecta L.). The flowering and yield parameters are significantly influenced due to growth regulator and pinching treatments. Of the varieties two hybrids tried, the mean days taken for flower appearance (41.72 days) and days to 50% flowering (51.72 days), maximum number of flowers (25.71), flower yield per plant (277.37 g) and flower yield per hectare (20.51 t/ha) was observed in V1 and it was followed by the V2. The flower production, flower yield per plant and flower yield per hectare was found to maximum in GA3150ppm followed by GA3 100ppm which recorded the value of (31.80, 404.52 g, 30.02 t/ha and 29.73, 371.25 g, 27.47 t/ha), whereas control recorded the least value of (18.83, 161.44 g and 11.94 t/ha).