Herbaceous plants are plants that do not have a woody stem and die back to the ground each year. Examples of herbaceous plants include annuals, biennials, and perennials. Annuals complete their life cycle within one growing season, biennials take two growing seasons to complete their life cycle, and perennials can live for many years. Examples of annuals include petunias, marigolds, and zinnias. Examples of biennials include foxglove and hollyhock. Examples of perennials include daylilies, hostas, and peonies.