As the heat of summer fades and cooler nights set in, many gardeners assume the season is winding down. But in reality, September is one of the most important months for greenhouse growers, especially those focused on year-round harvests.

Many gardeners and homesteaders think greenhouses are only useful in spring. But with the right strategy, a well-built high tunnel or hoop house can help you grow food in all four seasons — even in northern climates where winters are cold and sunlight is limited.