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.
The term  perennial  refers to herbaceous (âgreenâ) plants since woody plants, such as trees, are perennial by definition. Unlike annuals, perennials tend to bloom for just a short time â one to three weeks â each year. Examples of popular perennial flowers include tulips, asters, black-eyed susans and lilies.hatâs because some of them are annual plants and some are perennial plants. Annual plants are plants with a life cycle that lasts only one year. They grow from seed, bloom, produce seeds and die in one growing season.