Integrating nano-fertilisers with conventional chemical inputs and biostimulants offers a pathway to sustainable intensification in heavy-feeding horticultural crops. A field experiment was conducted at the Central Research Farm, Bidhan Chandra Krishi Viswavidyalaya (BCKV), West Bengal, during the 2021–22 Rabi season to evaluate the synergistic impact of straight fertilisers, nano-fertilisers and biostimulants on the growth, yield and quality of cabbage. The experiment was designed in randomized block design (RBD) with 3 replications 9 treatments, including combinations of straight and nano- fertilisers, were tested to achieve optimal yield targets. Among the 9 treatments, T9 comprising the soil test crop response (STCR) dose for 550 q ha-1 yield target (134.5 kg nitrogen (N) ha-1 from urea + 2920 ppm N from nano-urea + 155 kg phosphorus ha-1 from single superphosphate [SSP] + 278 kg K ha-1 from muriate of potash [MOP] + 400 ppm Sagarika [seaweed extract 28 % w/w]) recorded the maximum plant height (25.86 cm), leaf length (26.63 cm), leaf width (25.20 cm), number of non-wrapper leaves (14.33), polar length (16.87 cm), equatorial diameter (17.82 cm), fresh weight of plant (2.09 kg), head weight (1.39 kg), marketable yield (627.67 q ha-1 ), total sugar (4.92 %), reducing sugar (2.97 %), non-reducing sugar (1.95 %) and ascorbic acid (17.57 mg / 100 g) while achieved the lowest moisture content (84.50 %). From an economic perspective, T9 generated the highest profitability with gross return (₹ 313835 ha-1), net income (₹ 202639.9 ha-1) and benefit-cost ratio (B:C Ratio) (1.82). However, maximum total soluble solids (TSS) of 6.761 °Brix were observed in T6 (STCR dose for 550 q ha-1 through straight fertilisers), while the highest moisture content (90.55 %) was recorded in the control (T1). These findings suggest that integrating nano-fertilisers with conventional fertilisers and biostimulants enhances cabbage growth, quality and profitability presenting a promising approach for sustainable crop production.