Lettuce is an annual or biennial plant with an easy and fast life cycle. The lettuce seedling takes up to 5 days to germinate. The germination process from seed to harvest of lettuce plant takes 66 to 120 days. Unless germination is stimulated. The period of bolting tends to last 30 days while flowering takes approximately 2 to 3 months. After the opening of the flower head, seed ripening starts in 11 to 13 days.