Background: Herbal hair oils represent an important segment of cosmeceutical preparations with immense therapeutic and nutritive potential. The present study aims to develop and evaluate a polyherbal hair oil incorporating five medicinally significant plant extracts Nagarmotha (Cyperus rotundus), Curry Leaves (Murraya koenigii), Amla (Phyllanthus emblica), Hibiscus (Hibiscus rosa-sinensis), and Fenugreek (Trigonella foenum-graecum) in a coconut oil base. Methods: Three formulations (F1, F2, F3) were prepared with varying concentrations of herbal extracts. The formulations were subjected to organoleptic evaluation (colour, odour, taste), physicochemical parameters (pH, viscosity, specific gravity, refractive index, acid value, peroxide value), and accelerated stability testing at 25°C, 40°C, and 45°C for six months. Results: All three formulations demonstrated acceptable physicochemical profiles. F2 showed the optimum balance between extract concentration and physicochemical stability, with pH 5.5 ± 0.04, viscosity 48.7 ± 1.5 mPa•s, and no significant changes during the stability period. Conclusion: The polyherbal formulation F2 is stable, cosmetically elegant, and shows promising potential for hair growth promotion and scalp health maintenance.