This article details and justifies Grounded Theory as a methodology for researching into significant and emerging macromarketing phenomena, through an exploration of its use to investigate the marketing dynamics of the Fairtrade Towns Movement. The paper describes the research journey undertaken from the initial consideration of Fairtrade Towns as an under-researched and challenging topic, through to the final production of new theory rooted in the reality of the research context. The philosophy and systematic processes that underpin Grounded Theory are explained, along with examples of how the key processes of data collection and analysis were undertaken. The insights generated in this paper demonstrate Grounded Theory as a suitable, yet underused, research approach available to macromarketers. It is revealed as a methodology that can bring rigor and confidence to research into emerging macromarketing themes, and the paper concludes by considering its potential for application in key spheres for future research.