Two field experiments were carried out at Gemmiza Research Station Gharbia Governorate during 1996 and 1997 seasons to study the effect of citrine (containing 15% citric acid and 18% micro elements Ferrous, Manganese and Zinc) compound and citric acid on cotton plants^­cv. Giza 75. Citrine treatments were at two rates, i.e. one and two U fed. and citric acid treatments were at three rates, 200, 300 and 400 ppm Cotton plants were sprayed once at start of flowering or twice, at start of flowering and after 15 days from the first spray. The results showed that one spray of citrine or citric acid increased significantly pl­ant height and number of fruiting branches per plant in one season only. one or two sprays did not affect boll weight. In general all, treatments significantly increased seed index in one season while, lint percentage was not significantly affected in both seasons. Earliness of yield and seed cotton yield were significantly affected. Various concentrations of citrine or citric acid had a significant effect on fiber properties in both seasons. In cotton leaves, all chlorophyll forms i.e., chlorophyll a, b and to­tal chlorophyll increased significantly by spraying these compounds ei­ther once or twice_ The hgihest levels of reducing sugars and total solu­ble sugars were observed when 300 ppm citric acid was used once or twice. Two sprays of these compounds seemed to increase slightly the phenolic compounds such as polyphenols and total phenols. Seed oil per­centage was significantly affected by treatments in both seasons.