To study effect of sowing dates on growth and yields of Indian mustard (Brassica junceaL.). Keeping in this view experiment was conducted in Split Plot Design (SPD) with three replications having two factors. First factor comprised of three dates of sowing (15 Oct, 10 Nov. and 05 Dec.) whereas, second factor consist of three Indian mustard varieties viz; Varuna, Narendra rai-1 and Kranti. Results showed that both dates and varieties (10 Nov. and Varuna) superior compare to rest of treatment. However, highest growth attributes (plant height, dry matter accumulation, Days taken to 50% flowering, number of tillers, LAI and yield and yield attributes (No. of siliqua (cm)per plant, length of siliqua (cm) test weight, seed yield(q/ha) grain yield, stover yield, biological yield, and harvest index) was recorded under 10 Nov. and Varuna variety, and oil character. At Lowest yield recorded under dates and varieties at 15 Oct. followed by 05 Dec. and Narendra rai-1 and Kranti. Among treatment, dates and varieties (10 Nov. and Varuna) showed effectively increasing the growth and yield and enhanced the nitrogen content efficiency and oil content and oil yield. K e y w o r d sSowing dates, Varieties, LAI, No. of siliqua, No. of Branches per plant