•To foster employees’ green behavior, organizations should develop green transformational leadership traits in the supervisors.•Green human resource management practices play a significant role in enhancing employee's green behavior.•Organizations should make policies to enhance employee's environmental knowledge to help the employees to exhibit pro-environmental behavior. The study examines the role of green transformational leadership (GTL) in fostering pro-environmental behaviors (PEBs) through green human resource management (GHRM). In addition, a moderating role of environmental knowledge is also investigated. The partial least squares structural equation modeling (PLS-SEM) technique is employed to test the hypothesized relationships. The findings revealed the significance of GTL in predicting employees' PEBs through the mediating role of GHRM. Further, the moderating role of environmental knowledge is also confirmed. This study presents a thorough and synergistic comprehension of the process through which PEBs can be promoted. In doing so, the study offers a deeper understanding of the interconnected mechanisms that promote PEBs and eventually guide organizational practice.