Arico…said….{START -And since last week I've been wondering about winter (evergreen) interest too because I never really found it all that important (it's winter so I'm not much out anyways), but we have huge windows at the back, so some green to look at from inside the house would be nice. -END}
That is a good point adding a fall color using deciduous small trees with bright fall leaf color blended with winter evergreen interest . This technique is really about the application of a 4 season garden. Not sure what zone you are in or what plants survive in your zone .
The pic below is an example of my garden with fall using deciduous trees and winter interest thru various colors of evergreen foliage using many evergreen shrubs and trees.
Look for slow growing mini evergreens and low growing evergreen shrubs lot les trimming and up keep is essential to keep the shape and warm glow during winter. Look for evergreen shrubs and small trees in colors ..reds, yellows, blue greens etc that accent and dot the garden area with bright color. Available in your zone. Winter is a good time to shop in for visuals of shape and sizes and to see the colors available in your zone.
Even tree bark white , golden colors and striped green and white, dwarf maple trees are excellent trees to grow for fantastic year round color. And exceptional fall color. During the winter the twisted bark of several small deciduous trees add lateral interest and movement to the garden.
Catalogues are also a good study guide for color , size , leaf and trunk color shapes and visuals in ctlogesmwill help,to orient the various specimens needed to acquire the lookmfoe. 4 seasons garden.
Winter evergreens pic from back garden window.