The ZnO nanorods were fabricated by hydrothermally on induced seed layers by various concentrations of equi-molar of Zinc Nitrate Hexahydrate (Zn(NO3)2.6H2O) and hexamethylenetetramine (HMTA). The crystal structure, orientation and optical properties were investigated by GIXRD and UV. Crystallite sizes and c/a ratio were calculated from Grazing Incidence X-ray diffraction (GIXRD) patterns whose values are decreased with increasing concentration. Optical properties were studied using UV – Visible Spectroscopy and strong absorption peaks observed at the wave length 379.5nm for higher concentration. The Raman studies are showed every E2 (high) mode peak shifted to lower Raman frequencies compared with ZnO single crystal. FESEM image results are seen, the prepared ZnO nanorod structure have best crystalline nature of the material and all the films exhibited tensile stress, which can also confirmed by GIXRD results.