Rudbeckia Autumn Sun is a big boy at 4-5' tall. Coneflower shaped blossoms sport a buttercup yellow skirt of petals, which wrap around a crested green cone. Deep green serrated foliage shows a white vein. Never needs staking.
Rudbeckia nitida are excellent back-of-the-border plants. Attractive to butterflies and great cut flower. Pairs well with ornamental grasses and tall varieties of New England asters.
Prefer moist, fertile well-drained soil. Although drought tolerant, Rudbeckia bloom better with ample moisture. Pinching can produce more compact plants in taller varieties. Allow seeds to fall to assure permanence in the garden. Spent flower heads can be cut back to prevent too many "volunteers". Can be divided every 4 years in spring. Spent foliage can be cut back to 6" for a flush of new growth.