The study aimed to formulate and evaluate a polyherbal hair serum using Aloe vera gel as the base, combined with extracts of flaxseed, fenugreek, hibiscus, and Nigella sativa. These herbal ingredients were chosen for their hair-strengthening, growth-promoting, and scalp-nourishing properties. Lavender oil was added for fragrance and soothing effects. Five formulations (F1–F5) were prepared by varying extract concentrations and evaluated for physical appearance, pH, homogeneity, viscosity, and spreadability. All formulations showed a smooth texture, greenish color, uniform consistency, and acceptable pH for topical use. The optimized batch exhibited excellent homogeneity and desirable viscosity, indicating good stability and ease of application. The findings suggest that the developed aloe-based herbal serum offers a natural, safe, and effective alternative for promoting hair health and scalp nourishment.