In this study, it was intended to identify the most suitable rootstock X scion combination, taking into account the carbohydrate content of grapefruit leaves of Marsh Seedless, which is amongst important citrus varieties, in terms of our country and our region, hanging on Troyer and Carrizo citrange rootstocks and considered an alternative to sour orange. The trees, which were 18 years old at West Mediterranean Agricultural Research Institute, have been used as experiment material. The highest carbohydrates contents were found at trees on citrange rootstocks. When we look for seasonal changes, we determined that total carbohydrates, starch and carbohydrate/nitrogen (C/N) rate increases from spring to summer and decreases to fall; total sugar, reduced sugar and sucrose content decreases from spring to fall and increases to winter. As a result of our study, the highest total carbohydrates contents were found at trees on Carrizo citrange rootstocks. On the other hand, higher starch, total sugar, reduced sugar and sucrose were determined on citrange rootstocks.