The majority of small-and medium-sized enterprises (SMEs) in the wine industry are family owned and operated providing a unique organisational structure to study environmental sustainability engagement. However, researchers at the intersection of environmental sustainability (ES) and family businesses tend to oversimplify family businesses as homogeneous regarding ES. Therefore, the broader goal of this paper is to investigate the antecedents of heterogeneities among family firms related to ES. The paper aims to understand how family firms portray different aspects of family influence (family goals, family values, culture and ethics, and the imprints of the founders and the next generation) in their ES disclosures. Family logics are used as a theoretical lens to analyse family influence. A qualitative content analysis of 72 corporate websites of family firms operating in the New Zealand wine industry was conducted. Antecedents of heterogeneities were revealed with a discussion of three typologies of family firms: family first, business first and upstarts.