Annuals are plants that complete their life cycle in one growing season. They germinate from seeds, grow, flower, produce seeds, and die all within a year. Common examples of annuals include marigolds, petunias, and zinnias. These plants are often chosen for gardens and landscapes because they provide vibrant colors and blooms throughout the season. Gardeners typically plant annuals in the spring after the last frost, allowing them to thrive during the warm months. Since they do not return year after year, annuals need to be replanted each season. This allows for a diverse and changing garden display, as different varieties can be selected each year.