Medicinal plants have long served as vital resources in traditional medicine systems worldwide, yet their cultivation faces challenges in yield, active compound production, and environmental adaptation. The revolutionary potential of nanotechnology in overcoming these constraints is examined in this chapter. We investigated the interactions between plant systems and artificial nanomaterials, such as metal nanoparticles (NPs), carbon-based nanomaterials, and polymer nanocarriers, to improve secondary metabolite production, stress tolerance, and growth characteristics. Nanotools, including nanobiosensors, play a crucial role in the advancement of crop production by enabling the precise management and control of inputs such as fertilizers, pesticides, and herbicides. This chapter describes the state-of-the-art applications in which nano-elicitors boost defensive mechanisms to improve the manufacture of bioactive compounds, nano-fertilizers supply nutrients with previously unheard-of precision, and nano-delivery systems maximize the growth regulator absorption. Recent field and lab research shows that varieties of medicinal plant species have significantly improved biomass accumulation, phytochemical profiles, and pharmacological effectiveness under nanoparticle treatment conditions.