Adding bold, stunning color to the garden, award-winning Rudbeckia hirta 'Indian Summer' (Black-Eyed Susan) is a biennial boasting stunning, extra-large daisy-like flowers, up to 6-9 in. wide (15-22 cm) - one of the largest blooms among Rudbeckia. The semi-double and single flowers are adorned with bright, golden-yellow rays surrounding a dark chocolate center disk. Blooming profusely from early summer to frost, it provides weeks of eye-catching color. The flowers are produced in such quantities that they almost cover the lovely foliage of mahogany leaves. An outstanding cut flower, its seed heads have good winter interest unless they are used in dried arrangements.