Salinity stress represents a significant challenge to the growth and survival of trees worldwide, including Romanian tree species such as Abies alba, Picea abies, and Larix decidua. This case study analyzes the responses of these species to salinity stress, aiming to present their physiological mechanisms and implications for sustainable forestry management. The selection of these particular species is justified by their ecological and economic importance in the Romanian forests. Through a comprehensive analysis of immediate physiological reactions, biochemical response, and the role of osmoprotectants and antioxidants, this kind of study illustrates different responses among the species and provenances. Implications for forestry management are many, with findings suggesting specific approaches to reduce the salinity stress and enhance resilience in afforestation and conservation works. The study illustrates the necessity of integrating such insights into forestry practices to ensure the long-term viability of Romanian forests. Challenges in understanding salinity stress responses and future research directions are outlined, highlighting the need for continued exploration to perform management strategies. In conclusion, this research contributes to a better understanding of salinity stress responses in some Romanian tree species and provides actionable insights for sustainable forestry practices.