An experiment was conducted on observing the influence of season and growing environment on the performance of leafy coriander var. CO (CR)4. Institute of Agriculture under Tamil Nadu Agricultural University located at Kumulur, Trichy district of Tamilnadu was the experimental station. The experimental design was split plot design with two factors and three replications. Leafy coriander of Rabi season performed well and recorded significantly maximum values in parameters such as germination percentage (63.36 %), plant height (27.18 cm), number of leaves per plant (36.16), plant height (6.76 g) and yield per hectare (7.29 t/ha) than kharif crop. Similarly coriander under polyhouse recorded maximum germination percentage (62.55 %), plant height (26.52 cm), number of branches (4.50), number of leaves per plant (36.40), plant height (7.57 g) and yield per hectare (7.99 t/ha). The interaction effect has more influence especially in polyhouse condition during rabi season. The result of the experiment on cultivating coriander under polyhouse during kharif and rabi as well as under shadenet during rabi season will be economically notable.