Stem elongation in canola is an important growth stage that typically occurs around the six-leaf stage and lasts for 1 to 2 weeks. During this stage, the stem rapidly grows taller and canola plants become thicker. The flower petals also start turning yellow during this time. The rate of canola growth is influenced by sunlight exposure and the growth process resumes when days become longer and average temperatures reach 40 degrees Fahrenheit. Maximum dry matter and nitrogen accumulation occur during the stem elongation and flowering stages, and stress during this time can limit dry matter production. The presence of surface residue in the seed row can also impact stem elongation and winter survival. In Washington, where establishment of winter canola is often challenging, it is best to seed shallow and in moist soil.