There are few small trees that have interest all season. Here are several to consider. Cockspur hawthorn (Crataegus crus-galli) bears white flowers in spring and has red fruits in late summer or autumn. Zones 4-7. Crabapple (Malus) flowers in spring in shades of red, white, or pink. Some selections offer colorful fruits, which attract birds in autumn. Zones 4-8. Downy serviceberry (Amelanchier arborea) offers white flowers in early spring, followed by edible red fruits. In autumn, the leaves turn burgundy-red. Zones 4-9. Eastern redbud (Cercis canadensis) produces pink or white flowers in spring and colorful leaves in fall. Some selections, such as 'Forest Pansy', have burgundy leaves. Zones 5-9. Kousa dogwood (Cornus kousa) blooms in early summer, producing pink or white flowers followed by large fruits that resemble strawberries. Zones 5-8.