If you are looking for golden blooms in mid or late summer, award-winner Rudbeckia laciniata 'Herbstsonne' (aka 'Autumn Sun') will not disappoint you. Very tall, this late flowering Coneflower features large daisy blossoms, 4-5 in. across (10-12 cm), with broad, drooping, bright golden petals surrounding a prominent pale green conical center that turns brown as it matures.