Perennial Plant. Biennial plants live for up to 2 years, flowering profusely in the 2nd year before setting seed. Full sun means 6 or more hours per day, while part sun is about half that.
Perennials are plants that come back each year. Perennial plants live for several years and flower every year. However most gardeners think of perennial plants as the herbaceous type, those that die back each year to reappear in spring.