Research of morphological characters and growth performace of new orange cultivars (Valencia Olinda, Pingapple and Sanh Ham Yen) was conducted in practical cultivated model at Ham Yen district of Tuyen Quang province. The result indicated that the growth of new cultivars was adapted to ecological and climatic conditions of Ham Yen district. Among three conducted cultivars, leaf shade of Valencia Olinda cultivar has grown vigorously and remarkably. After 2 years, leaf shade diameter reached to 94.4cm and diameter of stump was 3.28cm. However, each cultivar possesses different morphology and color of leaves. For example, B1 orang showed the largest zise of leaves 10.92cm in length and 5.4cm in width. All of cultivars have the similar leaf characters such as dark-green color, curved leaf surface and wide waist.