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.
Living for three or more years. Noun. A perennial plant. Asters, irises, and peonies are some examples of perennials. - First meant remaining leafy throughout the year; plants living three or more yearsâdying aboveground and sending up fresh growth every yearâare perennials.erennial. adjective continual, lasting, continuing, permanent, constant, enduring, chronic, persistent, abiding, lifelong, perpetual, recurrent, never-ending, incessant, unchanging, inveterate the perennial urban problems of drugs and homelessness. adjective.