The process of stabilizing soil entails the utilization of a wide variety of techniques and ways to enhance soil that may cause challenges in engineering and related sectors due to its poor strength as well as its tendency to shrink and swell. Stabilizing agents such as waste foundry sand (WFS), fly ash, waste from construction and demolition, rice husk ash, Sugarcane bagasse ash (SCBA), and sawdust ash are used to improve the geotechnical properties of the soil in order to alleviate the issues that have been brought to light. In this study, the efficacy of agricultural waste such as Sugarcane Bagasse Ash (SCBA) (at 5%, 10%, 15%, and 20% concentrations) coupled with lime (at 3%, 6%, 9%, and 12% concentrations) stabilized clayey soil with the addition of Molasses (at 5%, 10%, 15%, and 20% concentrations) is presented. The current research was conducted with the intention of developing a composite soil subgrade material for the purpose of designing the subgrade of flexible pavements. A number of different laboratory experiments, including Specific gravity, differential free swell, Liquid limit, compaction characteristics, and California bearing ratio (CBR) tests, were carried out on soil that had been amended with SCBA, Lime and molasses alone and in combination with each other in order to determine whether or not these ingredients were suitable for use as a subgrade material. The laboratory tests showed that the differential free swell and Liquid limit of Silty clayey soil dropped, Variation was seen in OMC and MDD values and CBR values increased on adding the optimal amount of SCBA (15%), Lime (9%) and molasses (10%) alone and in combination. Not only does the incorporation of SCBA, lime and molasses into the process of stabilization of silty clayey soil provide a solution to the difficulty of waste management, but it also offers a solution that is both cost-effective and environmentally friendly.