The main objectives of this study were to analyze farmers' managerial ability, social networks, and information sharing, and to describe the two-way relationship between managerial ability and social networks. We collected data through face-to-face interviews, using a structured questionnaire with a purposively selected random sample of 34 farmers in Khon Kaen province, Northeastern Thailand, in September 2013. All respondents belonged to an organic vegetable group. The findings revealed that almost all of the farmers have a high ability level in marketing, information searching, communication, and technical skills. Farmers with high ability, especially group leaders and group managers, have more chances to increase their networks through becoming consulters and transferring knowledge/technology. As a result, their social networks are more active and stronger, both inside and outside their villages. In addition, farmers with larger networks have more opportunities to assess information and exchange knowledge, so their ability can become even more effective.