Small Trees

• Witch hazel (Hamamelis virginiana) is a shrubby tree with yellow flowers. It grows from 15 to 25 feet tall and wide in zones 4 to 9, based on the United States Hardiness Zone Map (see Resources). The winter blooming cherry tree (Prunus subhirtella) grows 20 to 40 feet tall and 15 to 30 feet wide. It has pink blooms in early winter in zones 5 to 8.
  
  

Large Shrubs

• Camellia. Melody Lee
  
  Camellias grow 10 to 15 feet tall and 6 to 10 feet wide in zones 7 to 9. They are evergreen with showy blooms of white, pink, red and combinations of these colors in autumn or winter, depending on the variety. Winter hazel (Corylopsis spicata) has fragrant yellow flowers in March. It grows 6 to 10 feet tall and 8 to 12 feet wide in zones 6 to 8. Viburnums bloom in the fall or winter with white or pink flowers, depending on the variety. They grow in zones 4 to 10, also depending on variety.
  
  

Small Shrubs

• Mahonia (Mahonia species) is an evergreen shrub that has yellow flower spikes in December. It grows 2 to 4 feet tall and 4 to 6 feet wide in zones 4 to 9, depending on variety. Winter daphne (Daphne odora) has fragrant pink or purple flowers on bushes that are 3 to 5 feet tall and wide in zones 7 to 9.
  
  

Perennials

• Helleborus. Melody Lee.
  
  Helleborus plants are known as Lenten rose or Christmas rose, depending on the bloom time. They are small evergreen plants with cream, pink, purple or green flowers in zones 4 to 9. Winter aconite (Eranthus hyemalis) has yellow flowers in zones 3 to 7, while snowdrops (Galanthus nivalis) have white flowers in zones 3 to 9. Both are winter blooming bulbs.
  
  

Annuals

• Pansies (Viola species) are winter and spring flowers with purple, yellow, white and red multicolor blooms on small plants in zones 5 to 10. Snapdragons (Antirrhinum majus) have 12 to 36 inch spikes of yellow, pink, red or white flowers in zones 6 to 10. Blue forget-me-nots (Myosostis sylvatica) are only 6 inches tall and grow in zones 5 to 9.