The aim of this paper is to study the potential of synthetic aperture radar (SAR) for estimating wheat height using interferometry and polarimetry. Our contribution in this paper consists on a statistical relationship that we establish between field height measurement and backscattering coefficient, polarimetric parameters and interferometric coherence. For experimental validation, the height of wheat crops was determined through the different phenological stage for two types of wheat conducted irrigated and rainfed wheat. In the same period of field campaign, eight Radarsat-2 images and seven Sentinel-1 images were acquired over the region of Sidi Bouzid in the center of Tunisia. From these images, temporal variation of backscattering coefficient, interferometric coherence and polarimetric parameters were extracted and compared to the height variation of wheat. The results showed a weak correlation between wheat height and backscattering coefficient. A high correlation between height of wheat and polarimetric parameters principally Radar vegetation index (RVI) and Pedestal height ( r=0.9 and r=0.92 respectively) and an acceptable correlation between height and interferometric coherence (r=0.6).