I don't think this is what they mean by "planting for winter interest. . ."
Yesterday I found some pea plant volunteers that had sprouted from some plants that that the deer had trashed. I have never had peas sprout near Thanksgiving in Minnesota! An entry in my mother's diary said that she had pansies blooming December 7th and she had gone barefoot outside (again Minnesota). This must have been in the 60's.
What's still blooming for you?