Biennial plants are those that complete their life cycle in two years. In the first year, they typically grow leaves, stems, and roots, storing energy for the next phase. During the second year, they flower, produce seeds, and then die. Common examples of biennial plants include carrots and parsley. These plants often thrive in various climates and can be found in gardens and wild areas. Biennials play an important role in ecosystems by providing food for pollinators and contributing to soil health. Their unique life cycle allows them to adapt to changing environmental conditions.