It's best to visit many nurseries so you can see a variety of fall-blooming plants. You're also more likely to find some unusual ones. It blooms from late September until frost. For daisy lovers, there's Chrysanthemum nipponicum, which is covered with yellow-centered flowers with white petals. It starts blooming in September and can be used to extend the daisy season.
Many perennials provide added interest in the winter.
From late July to mid-September, Russian sage produces spikes of fragrant purple flowers above silvery foliage. It looks great next to shrubs that have red berries. Cultivars of wild goldenrod are extremely hardy and do well in partial shade and dry soil. In the fall, they're covered with golden-yellow flowers. After frost, the flowers turn fluffy white and later golden brown.