Over the last decade, much attention has been paid to the effectiveness of green reward practices in fostering employee achievement of environmental performance. The current literature reports contradictory findings and points to several gaps in our understanding. First, the effect of green rewards on individual environmental performance is mixed, at best. Second, the role of internal environmental orientation on this effect has been overlooked. Using data from two independent studies, this paper provides findings that help address these issues. The results show that organizational support for the environment conveys the effect of green reward practices on employee environmental performance and indicates that internal environmental orientation only strengthens the indirect effect at high levels. The findings are discussed in light of the literature. The findings draw on two independent samples. POSE conveys the effect of green rewards on employee environmental performance. Internal environmental orientation strengthens the mediating effect of POSE.