Chemical fertilizers harm the environment by releasing effluent from crops and chemical components. Thus, biofertilizers have emerged as a more environmentally friendly and safe complement to boost agricultural yield. The emergence of an innovative use routes for fertilizers mediated by nanotechnology. Their nanosized characteristics have been demonstrated to enhance productivity by facilitating targeted nutrient delivery or reducing the rate at which fertilizer must be applied. Different kinds of methods, including physical, chemical, and green (biological) synthesis, can be used to generate nanofertilizers. The green technique is better than the physicochemical approach because it uses few chemicals and hence produces less chemical contamination. For this reason, discussing environmentally benign synthetic nanoparticles as nanofertilizers is pertinent to a sustainable farming approach. The metal nanoparticles produced through biosynthesis that can be used as nanofertilizers are also covered in this report, in addition to their most current developments and applications in agriculture, creates a novel route for nanorevolution.