The history of Nelliyampathy is intertwined with the development of tea and coffee plantations during the British colonial era. In the late 19th century, British planters recognized the potential of the region's favorable climate and fertile soil for cultivating these crops. They established large estates, transforming the landscape and bringing economic activity to the area. The plantations attracted workers from various parts of the country, contributing to the cultural diversity of Nelliyampathy. Over time, the ownership of the estates transitioned to Indian companies and individuals. Today, Nelliyampathy continues to be a significant producer of tea and coffee, and its history is reflected in the colonial-era bungalows and plantation architecture that dot the landscape.