Ryerson's Roof Top Garden [Getty Images]

TORONTO, ON - OCTOBER 27: Garden coordinator Spencer Quinn readies a soil bed for planting garlic bulbs at Ryerson's roof top garden at the George Vari Engineering and Computing Center, October 27, 2015. It's harvest time for Ryerson University's rooftop farm after its first full growing season. (Andrew Francis Wallace/Toronto Star via Getty Images)

Toronto Star Andrew Francis Wallace