ZnO and α-Fe2O3 nanoparticles are synthesized employing simple eco-friendly wet chemical methodsto promote sustainable nanotechnology in agriculture. Two samples are evaluated for optical, microstructural, and compositional characteristics. These nanoparticles' impact on seed germination and plant growth promotion of Pigeon pea (Cajanus cajan Linn.) is assessed. With no harmful effects on seed germination, combining ZnO and α-Fe2O3 nanoparticles at a rate of 1:1 improves seeds' development and germination percentage. The favourable effect in seedling growth parameters (mean germination time, percentage germination, % water uptake, shoot length, and root length) and chlorophyll contents (chlorophyll a and chlorophyll b) can be associated with the increased absorption of zinc and iron in its nano form into the seed via supplements. Our findings additionally indicate that the development and germination rate of Pigeon peabecome more favourable as the concentration of NPs (at a ratio of 1:1) increases up to a certain level.