This study proposes that supply chain integration (SCI) has the key relational capability to support the strategic employment of green supply chain management (GSCM) practices. This conceptual paper will further the understanding of the employment of GSCM practices and SCI mechanisms, in addition to providing a comprehensive review of the literature on the interdependent relationship of GSCM practices and SCI with respect to organizational performance. Manufacturing firms are expected to benefit from learning of a helpful approach to applying GSCM practices, which will improve their overall organizational performance.