Oryza sativa is the primary staple food in Asia. However, the high demand for rice leads to the overuse of chemical fertilisers and requires an alternative. Thus, this study aimed to investigate the impact of the combination of palm oil mill wastewater (POME) and plant growth-promoting rhizobacteria (PGPR) on the growth of paddy cultivation. PGPR was isolated from lemongrass-cultivated soil and tested on nitrogen fixation, phosphate solubilisation and potassium solubilisation plates. POME, a byproduct from the palm oil milling process, has been combined with PGPR in powder form with different ratio combinations. The combination of POME: PGPR treatments was used in the following ratios: T0 = (0 g: 0 g), T1 = (5 g: 0 g), T2 = (0 g: 5 g), T3 = (5 g: 10 g) and T4 = (10 g: 5 g) and applied it alternately once in a week for 30 days in glasshouse condition. Treatment T4 produced the highest result in rice plant height (42.6 cm), rice plant dry weight (0.777 g) and root dry weight (0.700 g). Specifically, these values represent a 4.39-fold increase in plant height, 1.17-fold increase in plant dry weight and 3.70-fold increase in root dry weight compared to control (T0). These findings show that the combination of POME and PGPR may be a potential organic biofertiliser as an alternative to chemical fertilisers.