How do annual, biennial, and perennial plants differ in their life cycles?

Plants are categorized by the duration of their life cycles, which dictate how they grow, reproduce, and survive across seasons.

Annuals

Annual plants complete their entire life cycle—from germination to seed production and death—within a single growing season. Because they do not survive from one year to the next, their survival depends entirely on the dormant seeds they leave behind. Common examples include many cereal grains, lettuce, and garden flowers like marigolds.12

Biennials

Biennial plants require two growing seasons to complete their life cycle. During the first season, they focus on vegetative growth, developing roots, stems, and leaves. In the second season, they produce flowers, fruits, and seeds before dying. Familiar examples include carrots, parsley, and beets.32

Perennials

Perennial plants live for many years and typically flower annually. In temperate climates, their aerial parts often die back at the end of each season, but the plant survives through underground structures such as bulbs, rhizomes, or tubers, which produce new growth the following year.2