Canola is a plant that is a member of a large family of plants called crucifers. Crucifers are easy to identify because the four yellow flower petals form the shape of a cross. The canola plants grow to a height of one to two metres. The yellow flower produces seed pods that are about 5 centimetres in length. There is an average of 60 to 100 pods per plant. Each seed pod contains 20 to 30 tiny, round seeds which are 1 mm. in diameter. When it is ready to harvest, the plant changes colour from green to light yellow. These tiny seeds are crushed to extrude canola oil.