Some herbaceous perennials are short-lived, lasting as little as three years. Others are more durable, providing a display for 10 years or more. Herbaceous peonies, for example, can live for up to 50 years.
Perennials will last longest if grown in the right conditions and cared for properly. Over time, many perennials become densely congested and need lifting and dividing to give them a new lease of life.