Although greenhouse tomatoes still constitute a minority share of the U.S. fresh tomato market, their influence is growing in retail channels, which represents about half of U.S. tomato consumption. The greenhouse tomato industry has established itself as an important part of the North American fresh tomato industry. According to an article published in 2005 by the U.S. Department of Agriculture, Economic Research Service, around 37 percent of all fresh tomatoes sold in U.S. retail stores are greenhouse produced, compared with negligible amounts in the early 1990s.
In a consumer society that appreciates differentiation and variety, greenhouse tomatoes can be seen as one more development in this trend in regards to tomato offerings, which has also seen a growth in the variety of in field-grown tomatoes. These improved varieties, as well as the positive health benefits associated with eating tomatoes have helped to contribute to a 30 percent rise in U.S. consumption of fresh tomatoes since the mid 1980s, with estimated 2003 annual per capita consumption levels around 19.4 pounds.
While greenhouse tomatoes typically have higher retail prices than field tomatoes, several factors have contributed to the growth in this sector: Their protection from weather and other conditions generally produce a much more uniform appearance than field tomatoes. Also, they are less likely to experience swings in production volumes. These factors have led to a greater consistency in quality, volumes and pricing – issues that are of particular concern to the retail and foodservice industries.
Major greenhouse industries have been established in Canada, the U.S. and Mexico, with the United States being the largest North American market for greenhouse tomatoes. However, in recent years, the growth in U.S. imports has exceeded the growth in U.S. production. In 2003, Canada accounted for an estimated 46 percent of U.S. imports of greenhouse tomatoes.
One such Canadian greenhouse tomato grower is Great Northern Hydroponics, located in southern Ontario, where the singular focus is the production and packaging of gourmet tomatoes on the vine through state-of-the-art hydroponic technology.
Great Northern Hydroponics’ 50-acre greenhouse facility is capable of producing more than 2.1 million cases of gourmet tomatoes annually. The latest production techniques are applied such as raised troughs, inter planting, run-off fertilizer recycling, computerized climate controls, biological pest management, and computerized labor tracking.
The result is a tomato high in nutrients with extended shelf life, pesticide and herbicide free, and provides customers with significant value and uncompromised quality. Packaging capabilities are fully automated with the latest technology and include the ability to package in bulk, stickered and unstickered, and in plastic or netted bags.
At Great Northern Hydroponics, tomatoes aren’t the only thing the company is producing. Having recently signed a 20-year power purchase contract with the government of Ontario, Canada, the company has also developed a 12 mega-watt electrical power facility. Under this contract, the Canadian government will purchase enough electricity generated by the plant to power 5,000 residential homes in the local area.
Creating electricity from natural gas produces substantial amounts of thermal energy, as well as carbon dioxide exhaust emissions. This thermal energy, in the form of hot water, will be supplied to Great Northern Hydroponics to heat the greenhouse.



