In Côte d’Ivoire, plantain is a widely consumed food. It’s grown in all humid agroecological areas of the country. Despite its adaptation to these areas, plantain production remains insufficient on the coast of cultivation soils salinization. This study aimed to improve plantain production in coastal area of ​​Côte d’Ivoire by obtaining vivo-plants. It was conducted to evaluate agronomic performance of plantain vivo-plants from environments treated with increasing solutions of NaCl (0, 5, 10 and 15 g/l) and Sargassum natans (25, 50 and 100%). Two-month-old plants were transferred to plots developed in Azaguié locality and some production and yield parameters were evaluated. Results showed that time interval between planting and flowering and production cycle were short in plants from environments treated with S.natans (50 and 100%) and NaCl (5 and 10g/L) solutions. Average mass of bunches and middle finger varied according to plants from different treatments. However, the best yields were obtained with T 50% concentration of S. natans extract (18.33 t/ha) and 5g/L of NaCl solution (16.32 t/ha) compared to control (14.35 t/ha). In conclusion, concentrations of 5 g/L of NaCl solution and T 50% of S. natans extract can be used to evaluate tolerance of plantains to soil salinity to improve yield.