Perennial plants are those that live for more than two years, continuously growing and flowering season after season. Unlike annuals, which complete their life cycle in one year, or biennials, which take two years, perennials return each growing season without needing to be replanted. Popular perennial plants include daylilies, hostas, and lavender. These plants are favored for their durability, long-term beauty, and ability to establish a lasting presence in landscapes and gardens.