Annual flowers are flowers that grow, bloom and set seed in a single growing season. These plants continuously make flowers all summer long, unlike perennial flowers, which bloom only once a year. Some examples of annual flowers include marigolds, petunias and zinnias. They are usually brightly colored.
Annual flowers are ideal for a burst of fresh color in the summer garden. They are typically smaller than perennial flowers and shrubs, which can live for many years. These flowers are often used with other perennial plants to add variety and color. They must be replanted each year, allowing the gardener to exercise endless creativity with each new growing season. Seeds from annual flowers can often be collected and used for the next year's planting, or new plants can be purchased from a nursery.