In this paper, we extend the research on strategy-as-practice (SAP) by exploring the dynamics and historical embeddedness of practices related to strategic planning in a pluralistic environment. We use a longitudinal case study design combined with historical methods and focus on the evolution of strategic planning over nine years. We operationalize the framework of strategic planning as a social practice, presented by Langley and Lusiani (2015), and find the dynamics of strategy practices in a pluralistic environment to be incremental. We find six historically embedded practices related to strategic planning, including production practices (formalization, integration, coordination and participation), textual practices, (of evolving content) and consumption practices, that evolve over time. We extend the theoretical framework of Langley and Lusiani (2015) to include dimension of historical embeddedness. This extends SAP research by enlarging the understanding of contextually situated and historically embedded strategy practices. We operationalize historical embeddedness in context of SAP. Keywords: Dynamics, historical embeddedness, pluralism, strategy-as-practice, strategic planning