This study investigates the geomechanical properties of soil reinforced with Vetiver roots, addressing erosion and landslides caused by inadequate soil and water management. It underscores the role of vegetation in enhancing surface stability and soil profile depth through hydromechanical mechanisms that increase soil cohesion and friction angle, reduce surface runoff, and lower pore pressure. Granulometry, Atterberg limits, and triaxial tests were employed to comprehensively assess these properties. These methods provide a detailed understanding of soil characteristics by comparing samples with and without Vetiver roots. Notably, the triaxial test determines the soil’s shear strength and stiffness, which are critical for the design and stability of geotechnical structures. The samples were collected at various depths under controlled conditions to preserve the soil’s and roots’ integrity. The soil-root interaction increases the silt’s shear resistance strength due to the apparent increase in soil cohesion and friction, which is also related to the density of the roots in the soil.