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System created in Nebraska combines underground pipes, polycarbonate covering, and air circulation to keep a greenhouse productive in the middle of winter, using the stable temperature of the soil as an ally to grow citrus fruits, vegetables, and flowers all year round.
In Alliance, in western Nebraska, a greenhouse created by a retired mailman has shown that it is possible to grow citrus, vegetables, and flowers all year round even in a region known for snow, wind, and intense cold.
Named Greenhouse in the Snow, the solution uses pipes buried about 2.4 meters deep to take advantage of the more stable soil temperature, which reduces the dependence on conventional heating during harsh winter periods.
Behind the idea is Russ Finch, a former employee of the United States Postal Service, who turned practical tests into a commercial model based on shallow geothermal energy aimed at protected cultivation in cold regions.
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According to the Nebraska Business Development Center, affiliated with the University of Nebraska at Omaha, the company associated with the project has sold more than 700 kits, with parts manufactured in Alliance by Antioch Machine, a partner in the initiative.
Although the logic seems simple, the operation requires technical planning because performance depends on the depth of the pipes, air circulation, structure sealing, and adaptation to local climatic conditions.
How the greenhouse uses soil heat in Nebraska
While the surface faces negative temperatures, the subsoil maintains a more constant thermal condition at a certain depth, creating a natural source of balance for the internal environment of the greenhouse.
In the model described by the institution, the system uses the natural temperature of the earth at 8 feet, equivalent to approximately 2.4 meters, where the soil remains around 52 degrees Fahrenheit, about 11 degrees Celsius.
Before entering the greenhouse, the air circulates through pipes installed under the ground, a path that helps to mitigate the cold in winter and also contributes to reducing heat during the warmer months.
With this combination of underground pipes, polycarbonate covering, and forced circulation, the structure maintains more favorable conditions for plants that would not normally be associated with Nebraska’s winter.
The contrast drew attention because Finch managed to grow oranges, lemons, other fruits, vegetables, and flowers in a landscape marked by low temperatures and accumulated snow part of the year.
The search for the system began when Finch was looking for a natural way to heat his house, but the tests evolved into a greenhouse capable of using shallow geothermal energy for thermal control.
From Home Experiment to Geothermal Greenhouse Business
The transition from a domestic experiment to a commercial product occurred after Finch sought out Allen Bright, owner of Antioch Machine, to manufacture components used in the construction of the greenhouses.
The partnership began in 2010, and Bright took on manufacturing, sales, kit delivery, and visits to the demonstration units maintained on his property.
In the kits sold by Greenhouse in the Snow, the buyer receives structure, polycarbonate covering, and detailed assembly instructions, maintaining the same principle of underground air circulation.
The model cited by the development center is 17 feet wide, about 5.2 meters, and can be produced in different lengths, depending on the land and cultivation needs.
According to the company, Finch perfected the concept over 35 years, until consolidating a design that began to be sold commercially starting in 2013.
The official page of Greenhouse in the Snow also records that Finch died in November 2024, after becoming the name associated with the creation and design of the system.
Recognition of the Sustainable Project in the United States
The project gained prominence by combining a simple engineering solution with a common challenge in cold regions: maintaining protected agricultural production year-round without excessively increasing energy costs.
Besides the visual appeal of snow outside and citrus plants inside, the greenhouse became a practical example of how shallow geothermal energy can be applied in small agricultural structures.
Finch and Bright received guidance from the Nebraska Business Development Center in research, competition analysis, business planning, and website improvements, support that helped structure the commercial operation.
In 2014, Greenhouse in the Snow was named Sustainable Business of the Year by the center, and the following year received recognition from the Small Business Administration in Nebraska’s congressional district III.
Built at Finch’s home, the original greenhouse remained for more than two decades as a demonstration of the technology, attracting those interested in protected agriculture and low-energy consumption solutions.
In December 2022, however, the structure was destroyed by the weight of accumulated snow, according to the company’s official page, which claims to have used the experience to continue developing the business.
Expansion of Greenhouse in the Snow Outside the USA
Even after losing the original unit, Greenhouse in the Snow maintained operations through the manufacturing of kits and demonstrative greenhouses linked to Allen Bright.
Outside the United States, the company reports having licensed the product in Europe in January 2020, with operations associated with the Brittany region in France.
In Canada, the system also began to be manufactured under license starting in 2020, according to the Canadian division of the brand, expanding the commercial presence of the project in cold markets.
The same Canadian source states that there are greenhouses in production in the United States, Canada, and Europe, although it presents a number higher than the figure of more than 700 units cited by previous sources.
As the available counts appear on different commercial pages, the safest formulation maintains the figure of “more than 700 kits,” confirmed by the Nebraska Business Development Center and by Greenhouse in the Snow itself.
Installation requires technical planning and climate adaptation
No greenhouse of this type works just by burying pipes in the ground, as the result depends on correct installation, choice of materials, efficient sealing, and sizing of air circulation.
The local climate, the depth of the pipes, the quality of construction, and the balance between light entry, thermal insulation, and air renewal also affect performance.
Even so, the central principle remains straightforward: use the thermal stability of the earth to help control the temperature of a growing environment in areas where winter usually limits production.
Based on this logic, Finch transformed buried pipes, polycarbonate, and air circulation into a system capable of bringing oranges, lemons, vegetables, and flowers to a landscape marked by Nebraska’s winter.
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