High tunnels, also known as hoop houses, are relatively simple polyethylene-covered greenhouse-like structures built over ground beds. High tunnels can be used to extend the production season and marketing window of a wide variety of crops. They have been used in Kentucky to produce early season vegetables, cut flowers, brambles, and strawberries. High tunnels can also make it possible to produce leafy greens and herbs during the winter. Shaded, well-vented high tunnels can be used to grow some cool-season crops later into early summer.