Nine field studies were conducted during 2011 to 2013 in Ontario to determine the effect of flumioxazin residues on winter wheat. For early- and mid-fall applied flumioxazin, there was no impact of the interval, 1, 2 or 4 weeks pre-plant (WPP), between flumioxazin application and winter wheat planting on injury, plant height, and yield. Injury was low, ranging from 0% to 4%, and was generally higher when flumioxazin was applied at 142.8 g ai ha^-1 compared with 35.7 or 71.4 g ai ha^-1. For late-fall applications, there was greater injury in the fall when flumioxazin was applied 2 WPP vs. 1 WPP. When combined over flumioxazin rates, winter wheat injury was 16% to 24% and 0% to 3% at 2 and 1 WPP, respectively. Injury increased when the rate increased from 35.7 to 142.8 g ai ha^-1. Flumioxazin applied at 142.8 g ai ha^-1 caused 1%, 5%, and 6% injury when applied 1 WPP and 32%, 53%, and 37% injury when applied 2 WPP at 1, 2, and 3 weeks after emergence in winter wheat, respectively. In all studies, flumioxazin applied at 35.7, 71.4 or 142.8 g ai ha^-1 applied at various application timings caused no adverse effect on winter wheat height and yield.