An experiment was conducted to access the effect of varying level ofN, P, K (50, 75 and 100%of recommended dose of N:P:K :: 50:40:40) and three different bio-inoculants(Bacillus, Pseudomonas and PSB) on vegetative growth and yield of coriander at Tirhut College of Agriculture, Dholi (Dr. Rajendra Prasad Central Agricultural University, Pusa, Bihar) during Rabi season 2016-17 to 2018-19. The application of RDF (100% N,P & K) + Bacillus (10kgha^-1) influenced most of the yield attributing characters consequently resulting in highest yield and realization of highest cost benefit ratio. Maximum number of primary and secondary branches per plant (7.48 & 27.50), number of grains per umbel (49.15),grains per umbellet (7.84), yield per hectare (23.07 q)and highest return of Rs. 2.19 per unit cost with highest net profit of Rs. 99,165.00 per hectare was found in treatment, T₃- 100% N,P & K + Bacillus. The next effective treatment in terms of yield and economics was T₆: 100% N, P & K + Pseudomonas, which resulted in grain yield of 22.76 qha^-1and cost benefit ratio of 1:2.04 with net profit of Rs. 91,680.00 per hectare.

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