ABSTRACT Green product advertisements often face credibility challenges due to perceived greenwashing, contributing to the attitude‐behavior gap in green consumption. This research examines the strategic use of two‐sided messaging through five experimental studies, assessing its impact on green consumption across various product categories. We explore the nuances of message order, demonstrating that placing the negative message first can either weaken or strengthen green product purchase based on consumers' knowledge of the green product category. This finding highlights that conventional order may not always be effective, especially in green marketing, where consumer knowledge varies. Furthermore, we explore the interactive effect of consumer knowledge in two‐sided messaging involving refutational appeals. Overall, our research offers valuable insights for marketers aiming to strategically leverage two‐sided advertising to enhance green product adoption.