Plants that live at least 3 to 4 years are known as:

Plants that live at least 3 to 4 years are classified as perennials. This classification is based on their life cycle, which allows them to grow and bloom over multiple seasons without needing to be replanted each year. Perennials typically complete their life cycle over three or more years, and many of them will return year after year, often becoming more robust as they mature.

In gardening and landscape management, understanding the distinction between perennials and other types of plants is crucial. For example, annuals complete their life cycle within a single growing season, while biennials typically require two years to complete their life cycle, flowering and seeding in their second year. Succulents, on the other hand, refer to a class of plants that store water in their leaves or stems and may not specifically indicate their lifespan or life cycle pattern.

The longevity and growth habit of perennials make them an essential consideration in landscaping, as they can provide lasting beauty and structure to garden spaces, as well as require different care than annuals or biennials.