Plants that bloom in November in Zone 6 with yellow flowers

Chrysanthemum

The fall icon. Mounds of color when everything else is fading.

Native Witch Hazel

Spidery yellow flowers and intoxicating clove fragrance on bare branches in late fall. The last native shrub to bloom each year.

Sedum

Succulent leaves, tough as nails. Ages to deep crimson in autumn.