New research highlights how mushrooms like reishi (Ganoderma lucidum), oyster (Pleurotus ostreatus), and button (Agaricus bisporus) can be used to create metallic nanoparticles that boost plant growth, reduce chemical fertilizer use, and protect crops against stress. These fungal-made particles act as natural fertilizers and antimicrobials, improving soil health and crop resilience without the environmental downsides of synthetic inputs. The review points to myco-nanotechnology as a sustainable path forward for greener, more efficient farming.