The experiments were conducted to investigate the effect of compost rates and foliar spray with biohorm and chitosan on growth, yield and chemical composition of two cabbage varieties grown under sandy soil. Os cross cv. had the highest values of number of leaves /plant, head diameter, head weight, the percentage of dry matter and yield as compared with Nabrawy. Compost application enhanced growth parameters and yield. The highest values were obtained with 8 and 6 ton/fed. Also, chitosan treatment significantly increased head weight and diameter, number of leaves/plant and yield. As for chemical composition, Nabarawy cv. had the highest K content. Compost application at rate of 6 ton/fed increased N and K contents. Chitosan treatment showed significant increase of N, while biohorm treatment gave the highest K, Fe and Cu contents. A linear correlation showed that average of head weight was positively correlated with both head diameter and number of leaves per head. Also, total yield was positively correlated with head weight, head diameter and number of leaves per plant. In general, it might be concluded that Os cross proved to be a high yielded cultivar as compared with Nabarawy. In addition, compost application at rate of both 8 and 6 ton/fed, gave the highest total yield. Moreover, yield of cabbage plant sprayed with chitosan had the highest values.