Crataegus viridis, or winter king hawthorn, is non-native to Ontario, originating from southeastern U.S. from Virginia to Florida west to Texas and up the Mississippi River valley to Illinois. It grows well in average, dry, and medium well-drained soils in full sun. It is known for its high disease resistance compared to other hawthorn species. It produces edible berries but may be best to leave for other wildlife rather than human consumption. This species is mostly spineless,containing only occasional thorns and is tolerant of pollution, making it suitable for urban environments. However, its flowers have an unpleasant scent.