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.
Perennials. A perennial is a plant whose root stock is hardy enough to survive a cold winter. In very cold climates or with more delicate perennials, you may want to protect the roots over the winter. The most common way of protecting the roots is to add 2 to 4 inches of mulch on your perennial beds.