This study successfully demonstrated the green synthesis of aluminium-potassium hybrid nanoparticles (Pl-Al/KNPs) using P. longifolia leaf extract, providing a sustainable and eco-friendly approach to nanoparticle production. The synthesis process was validated through a distinct colour change and further corroborated by FTIR analysis, which highlighted the involvement of hydroxyl, carbonyl, and phenolic groups in nanoparticle reduction and stabilization. Morphological analysis via SEM confirmed the spherical shape of the nanoparticles,