With the cold weather we’ve had lately it’s hard to imagine that anything could be growing in the unheated high tunnels around our region. While some growers do let their tunnels rest over the winter, others keep them in production, growing crops of cold hardy winter greens – how do they do it?
The first step is to use a full-sized high tunnel. You might think that a smaller tunnel would be easier to keep warm but in fact, the opposite is true. The large volume of air in a high tunnel acts as a buffer, warming up quickly on a sunny day and cooling down more slowly than the outside air at night. » Continue Reading.