The results covered here are from experiments where the crystals grew into an area probed by terahertz radiation. Therefore, the onset of nucleation was not observed directly. The focus of on-going work is to trigger nucleation at desired locations (e.g. in the centre of the cell) so that the investigation can be extended from that of crystal growth to that of nucleation. The current setup is designed for operating temperatures between 4 • C to 9 • C, and this range can be extended further with simple adjustments. Therefore, this technique can be applied to investigate a wide range of crystalline and semi-crystalline systems, thereby offering an interesting perspective of low-frequency motions of multiphase systems.