Green gram is a valuable, fast-growing pulse crop widely grown in India during both the Kharif and Summer seasons. Its strong connection with helpful soil microbes, especially endophytic bacteria, plays an important role in boosting plant growth, nodule formation, and resilience to stress. In this study, we examined how different endophytic bacteria from mungbean, used alone or in combination with standard biofertilizers, affect plant performance in greenhouse conditions during summer and Kharif. We tested 41 bacterial strains for their ability to promote plant growth and selected four of the most promising: Beijerinckia fluminensis PM1219, Pseudomonas sp. PM1220, Bacillus flexus PM1217, and Bacillus amyloliquefaciens PM1218. These were applied alone and in combination with Rhizobium MB703 and the phosphate-solubilising bacteria (PSB) P36 to assess their effects on mungbean growth. The results showed that using these bacteria together led to more nodules, higher seed yield, and greater plant weight compared to not using them. The E13 + MB703 + PSB (P36) combination gave the best results, with the highest numbers for nodules, seed yield, and plant weight, especially during Kharif, likely because of the season’s favourable humidity and temperature. Our findings suggest that using these beneficial bacteria, especially E13 with Rhizobium MB703 and PSB P36, can help farmers grow healthier, more productive mungbean crops while reducing the need for chemical fertilizers. The positive interactions between these microbes improved nutrient uptake and plant growth. This research supports the use of more microbial solutions in sustainable farming and encourages further field trials to test these benefits across different regions.