Difference between Annual, Biennial, and Perennial Plants - BYJUS Annual plants complete their life cycle in one year. Biennial plants complete their life cycle in two years. Perennial plants continue to live up to more than two years. Examples. Mustard, watermelon, lettuce. Carrot, cabbage, onions. Mango, coconut, banana. Development. They germinate, grow, bear fruits and flowers, and die off in the same year.