The settlement's growth was constrained by the limited supply of water in the area. In the early years, water was transported to the town in barrels, which were sold for sixpence per bucket. Forced to cope with the lack of water, many of South Africa's earliest irrigation experts hailed from the region. The local economy came to be based primarily upon tobacco and ostrich farming. A severe drought in 1865 persuaded many of the settlers to move to the Transvaal. The 1865 census indicated that Oudtshoorn had a population of 1,145.