Annual plants are a garden designer’s secret weapon. Endlessly versatile and extremely showy, annuals add nonstop color without a high price or a lot of work. They are perfect for gardeners who crave change—from year to year or from one season to the next. And they offer instant impact for filling in bare spots between slower-growing shrubs and perennials. Summer annuals brighten gardens with flowers and foliage, while cool-season annuals bring interest to the winter landscape.