There are two types of canola: spring and winter, named as such for when they are planted. Spring canola is planted in early spring (March) and harvested around September. This type accounts for the majority of U.S. canola production in northern states. Winter canola planted in the fall (September) over winters and is harvested in June. Typically, winter canola will yield 20 to 30 percent more than spring canola. It is grown in warmer areas like the Southern Great Plains.