WRITTEN BY Bek Mitchell-Kidd PHOTOGRAPHY PROVIDED BY Vertical Harvest At an altitude of over 6,000 feet, a Jackson Hole winter can last until May, making the produce-growing season only a few months long. This shortened season creates the need for hundreds of thousands of pounds of food to be trucked into the area each year. Enter Vertical Harvest co-founders Penny McBride and Nona Yehia, who spent more than six years working with industry experts and local community leaders to develop a …