L-proline hydrate an intriguing organic material for frequency conversion has been grown by slow evaporation solution growth technique at room temperature. Their structural, optical and physicochemical properties were characterized by X-ray powder diffraction, Dielectric studies, UV-Vis spectra and SEM. The crystal belongs to orthorhombic system with space group P21 21 21. The material has a wide transparency in the entire visible region. It is found that the cutoff wavelength lies in the UV region. The mechanical response of the crystal has been studied using Vickers micro hardness technique.