This article presents the application of the "GROW model" (Goal, Reality, Options, and Will) in mentoring in rural areas, as a tool for the learning process and professional and personal development in the work of extension technicians in small family farms. This empirical research presents a case study, carried out in the Global South region, in the work of a rural extension worker on a small property. The results indicate the potential contribution of the mentoring tool in the organizational learning cycle between the extension technician and the farmer. The process generated new guidelines and actions to improve the profitability of the activity and the well-being and self-development of rural workers. The study has practical contributions to the performance of TARE technicians and responsible and theoretical agencies for the studies of organizational learning in small rural properties.