Aster 'Miss Bessie' came to my garden from Niche Gardens. After reading this description, how could I not try it? This is from their 1998 catalog:
"A warning -- I am crazy about Aster 'Miss Bessie'! During the fall I watched this mysterious tall Aster budding up in our roadside garden and assumed it was Wild Frost Aster. On an overcast Halloween morning, buds opened into hundreds (thousands?) of 1" medium purple, star-like blooms, floating at 4' and weaving with the tops of ornamental grasses. Bloom lasted for 3 weeks through light frosts -- an incredible late treat in the garden. 'Miss Bessie' does spread vigorously; plant her in the meadow or back of the border with plenty of space to run, and pull out wanted shoots in spring. A foundling in a Deep South garden, 'Miss Bessie' is of questionable parentage."