Evergreen foliage and colorful berries might be more prominent than flowers about now. They should be. Evergreen foliage is, as implied, evergreen. Colorful berries need to be appealing to wildlife that disperses their seed through winter. Not so many winter flowers bloom, though. Most flowers want their bloom season to be favorable for their pollinators.

Flowers that do not rely on pollinators can bloom whenever they choose to. Yet, because they do not rely on pollinators, most waste no resources on floral color. Flowers are, after all, only colorful to attract pollinators. Therefore, if flowers that need no pollinators bloom now, most are easy to ignore. Flowers that are colorful now can probably justify being so.

Most colorful flowers bloom while their pollinators are most active, during warm weather. Some from cooler climates can bloom now simply because they do not know it is winter. Some from milder climates can bloom now because they do not know how cool winter is. Several winter flowers actually bloom now to exploit pollinators who are active in winter.

Winter flowers of some species of Salvia appeal very specifically to hummingbirds. Such species are native to regions where hummingbirds overwinter. Their floral colors are the sort that hummingbirds pursue. Their floral structure and nectar favor the eating habits of hummingbirds. They bloom during winter because that is when they expect their guests.

Camellias of various cultivars are among the most popular and reliable of winter flowers. Different cultivars bloom at slightly different times. Witch hazel cultivars can bloom nicely on bare stems where chill is adequate. Winter jasmine requires less chill and blooms as splendidly, but only with yellow. Oregon grape is also limited to yellow, but is evergreen.

Cool season annuals generally provide the most colorful of winter flowers. Unfortunately, most perform only until warmer spring or summer weather. Pansy, viola and primrose are the most familiar. Primrose becomes popular a bit later, and can continue as a short term perennial. Ornamental kale looks like big winter flowers, but is really big colorful foliage.