“To plant a “Four Seasons Landscape,” among other things Susan Roth suggests : Develop garden bones with evergreen trees, shrubs, ground-covers and perennials. Plant evergreens for year-round greenery and background. Emphasize winter silhouette outlines. Look for plants that are showy over a long period. Select added features like attractive foliage and fruit. Choose plants that will be showy for several seasons and / or at “off” seasons, such as winter.”
Forest Farm : Ornamental and Useful Plants from Around the World (2008).