The purpose of this study is to examine the relation of external relationships and entrepreneurial infrastructure on the entrepreneurial orientation (EO) of tea manufacturing firms. An empirical survey was conducted with tea manufacturing firms located in a low grown area in Sri Lanka. Primary data were collected by administering a structured questionnaire at 109 tea factories. The findings indicated the importance of external relationships; specifically, relationships with supply chain partners and relationships with government facilitating institutions enhance the EO of tea manufacturing firms. However, relationships with other tea factories and educational and research institutions are not significant influences on firms’ EO in the context of the Sri Lankan tea industry. When considering the dimensions of EO, risk taking is influenced by external relationships and not innovativeness and proactiveness. Further, the entrepreneurial infrastructure provided by related institutions except other tea factories have positive links with EO. Such contributions are important to managers and policy makers to enhance the EO of tea manufacturing firms when facing competitiveness in the global market.