Annual Flowers- Enjoy long lasting summer color when planting annual flowers. Annual flowers are plants that live for one season. Annual flowers will need to be replaced year after year. Annuals generally last until the first frost or until growing conditions are no longer favorable. Our annuals come in a wide spectrum of colors and textures to please every gardener. When planting containers and baskets it is often said to plant thrillers (taller plants), fillers( plants that fill in around the pot) and spillers ( that trail over) to create a pleasing look.