Backyard Gardener: High tunnels extend growing season
High tunnels can take on many forms and use a variety of materials. “Caterpillar” tunnels at Whipstone Farm without end walls or doors are accessed from the side (upper left). 14-by-40 feet high tunnel at University of Arizona Research Farm (upper right). Small (4.2-by-8 foot) self-venting tunnel designed by Utah State University (lower right). Construction details and wiggle wire/track on Utah State University high tunnel. (Upper photos are from University of Arizona; lower photos are from Utah State University)