"High tunnels” were originally greenhouses with high sidewalls to enable tractors and tillers to easily enter and exit greenhouses from either end. These greenhouses were simple in design, with usually just one layer of poly, roll-up curtains and no electricity. Some of these greenhouses only had poly on them for a few weeks before the warmer weather allowed the cover to be removed safely without any damage to the crops. High tunnel greenhouses enabled local growers to produce crops during all four seasons and helped combat the forces of unpredictable weather, particularly in the early spring.

Today’s high tunnels may be as simple as a greenhouse frame with one layer of poly and roll-up curtains, or a more sophisticated greenhouse that is “moveable” and has roof vents, year-round covering, an irrigation system and heat. These freestanding greenhouses are available in all different widths and lengths. The most common use of a high tunnel is for tomato production, and is usually a 30’ x 96’ greenhouse; however, many other crops are being grown in greenhouses, including cucumbers, lettuce, strawberries, raspberries and herbs. Recognizing this trend in growing, seed companies have began to specialize in offering greenhouse-grown seed varieties and other unique varieties for heirloom and organic growing. High tunnels are all customized to meet the individual grower’s needs and are specific to the crop that is being produced.

The high tunnel concept will continue to gain popularity among growers due to the global need for food and the unpredictable weather patterns that farmers encounter. With the potential to increase cash flow out of season and open up new markets, high tunnels will create many opportunities for the family farm. Further information regarding the specifics of high tunnels can be found on State University websites and by speaking with other growers.