A free flowering herbaceous perennial producing a profusion of showy pom poms of double flowers from June to August. Flowers bloom yellow, gradually changing to two-tone yellow and finishing white. Makes a stunning show planted in bold drifts at the front of a sunny border. Forms a dense, upright mound of foliage. Attractive to bees and butterflies. Good for cut flowers. Plant in full sun, in average soil that is well drained. Hardy plant, low maintenance, easy to grow. Plant in the garden, or grow as a feature in a container.