The agricultural industry has always been the economic core of Christchurch. The city has long had industry based on the surrounding farming country. PGG Wrightson, New Zealand's leading agribusiness, is based in Christchurch. Its local roots go back to Pyne Gould Guinness, an old stock and station agency serving the South Island. That firm helped take deer farming techniques abroad. PGG Wrightson's overseas diversification includes dairy farming in Uruguay.
Other agribusinesses in Christchurch have included malting, seed development and dressing, wool and meat processing, and small biotechnology operations using by-products from meat works.
Dairying has grown strongly in the surrounding areas with high world prices for milk products and the use of irrigation to lift grass growth on dry land. With its higher labour use this has helped stop declines in rural population. Many cropping and sheep farms have been converted to dairying. Conversions have been by agribusiness companies as well as by farmers, many of whom have moved south from North Island dairying strongholds such as Taranaki and the Waikato.
Cropping has always been important in the surrounding countryside. Wheat and barley and various strains of clover and other grasses for seed exporting have been the main crops. These have all created processing businesses in Christchurch.
In recent years, regional agriculture has diversified, with a thriving wine industry springing up at Waipara, and beginnings of new horticulture industries such as olive production and processing. Deer farming has led to new processing using antlers for Asian medicine and aphrodisiacs. The high quality local wine in particular has increased the appeal of Canterbury and Christchurch to tourists.
In earlier years, Christchurch was one of the two heavy-engineering centres of New Zealand, with firms such as Anderson's making steel work for bridges, tunnels, and hydro-electric dams in the early days of
