Flowers that bloom during winter months are a treat. Although the color is subdued, the effect is dramatic because of the contrast between the dark stems, twigs and snow against the flowers, berries and fruits of winter bloomers. The areas where winter flowers bloom can be separated into region, with practically every region represented.
The Rocky Mountains are considered zone four, which ranges in temperature from minus 30 to minus 20 degrees Fahrenheit. In the dry Rockies, blooming winter flowers include crocuses and snow drop---a white, pear-shaped flower---both of which bloom in late winter. The American filbert, a tree which blooms with yellow catkins in the winter, is another variety, according to the "Great Plant Guide" by the American Horticultural Society.
Texas and the Southern Plains
The hardiness zones of Texas and the Southern plains range from zones six to eight, and flowers may not survive the harshest climate outliers in this range, according to the "Gardener's Desk Reference," by Janet Marinelli and the Brooklyn Botanical Garden. Winter bloomers include hybrid versions of the snapdragon, Christmas aster, Carolina jessamine, narcissus, Missouri violet and pansies.
In the Southeast, the hardiness zones range from six to nine and flowers that thrive in warmer winter temperatures may not survive cooler conditions, so it is best to check before planting. Winter flowers for these areas include certain species of camellia, wintersweet, crocuses, and winter honeysuckle, which blooms before the leaves bud, according to the University of Illinois Extension. Daffodils and winter jasmine, which blooms with yellow flowers, grow in this area as well.
The zones in the Northeast range from four to six, which means the average temperature ranges from minus 30 degrees Fahrenheit to zero. Flowers that bloom in the winter in this area include the Christmas rose, which, according to "Perennials," by James Underwood Crockett and Time-Life Books, blooms white and is more closely related to the buttercup than rose. Other winter flowers for the Northeast include the Balkan crocus, winter aconite, snowdrop and the Lenten rose, all of which bloom in late winter and early spring.