For more Oregon reading , check out: 1  These Are The 10 Best Places To Retire In Oregon. 2  These Are The 10 Most Miserable Cities In Oregon. 3  These Are The 10 Drunkest Cities In Oregon.
A perennial plant or simply perennial is a plant that lives for more than two years. The term is often used to differentiate a plant from shorter-lived annuals and biennials.
In the simplest terms, a perennial is a plant that lives for at least 3 or more years. We usually use this term to describe herbaceous perennials when talking about gardens. Trees and shrubs last for many years too of course, but these are woody plants.