Perennial Life Cycle.....Perennial plants live more than 2 years and are grouped into two categories: Herbaccous perennials have soft, nonwoody stems that generally die back to the ground each winter. New stems grow from the plant´s crown each spring. Trees and shrubs, on the other hand, have woody stems that withstand the cold winter temperatures. They are referred to as woody perennials. | Annuals | Perennials | Roses  |