Autumn Sneezeweed (Helenium autumnale) - Perennials that bloom yellow flowers, sometimes with shades of gold, orange, or red in their centers, in the late summer & fall. 
 
Growth: Can grow 3 -5 feet tall.
Light: Prefers full sun.
Soil: Well-drained, moist, acidic soil.
Hardiness: Disease resistant if adequately spaced with full sun.
Maintenance: Space 3 - 4 feet apart to ensure good airflow. Deadhead blossoms to encourage more blooms.
Benefits: Attracts butterflies & bees.