The aim of this qualitative study was to increase understanding of the business competencies necessary for established ecopreneurs to foster green growth. The results imply that the ecopreneurs need specific business competencies to succeed: in particular, an ability to make green values a part of their business operations, product offerings, and business relationships. It is essential to have competencies in developing high value-added products reflecting green values and communicating them to the consumers. When developing a business training program for the ecopreneurs, it is also crucial to consider competencies related to sustainable development and frame the program with its values.