They will flower longer than pansies, often well into the winter.
Most Violas bought in flower during the autumn may stop flowering in the winter but they will flower again in the spring.

Some extra hardy violas will flower all the way through the winter, we use one called ice babies but others are available, endurio for instance

These winter-hardy violas form a tight, mounded crown with a spreading habit. They have the ability to flower in short days, most violas and pansies need longer days to flower usually 10 hours of daylight or more.
Winter hardy Violas. lookout for Ice babies or Endurio
Bought in flower they light up the autumn and will carry on growing to flower again in the spring and early summer. True winter hardy violas can flower all winter.
Grown on the nursery in cool bright greenhouses, they don’t like warm dark stores and can deteriorate quickly. avoid stretched or yellow-leaved plants
Viola Ice babies
A new type of very hardy winter viola, they will flower through the winter with masses of flowers in the spring. A tumbling habit makes them ideal for patio pots and hanging baskets. Not to be confused with normal violas that stop flowering in the winter.
Supercharge your winter baskets with Ice babies

