By Angie Peltier, University of Minnesota Extension and Joe Ikley, North Dakota State University Extension Many farm fields in northwest Minnesota are able to grow canola quite well. Unfortunately most are actually attempting to produce soybean and the canola are volunteers -very competitive (and often herbicide tolerant) weeds. Drive-by scouting won’t necessarily reveal the canola plants until they begin to bolt and their bright yellow flower petals can be observed towering over the soybean canopy. Figure. Flower canola can be easily seen above a soybean canopy (photo credit: Manitoba Agriculture).