Coreopsis tend to be overlooked because they really don't strut their stuff until after all the summer annuals have blasted into the nursery with their showy colors. Coreopsis 'Tweety' not only produces masses of lemon-yellow daisy-like flower from summer into the fall, but adds a wonderful airy texture to container planters, borders, and mass plantings with its green feathery foliage. Better yet, this tough perennial comes back year after year and requires minimal watering once established. Bees and butterflies love the blooms, and humans can enjoy them as cut flowers.