3. Evergreen. With this Manhattan rooftop terrace, boxwood (Buxus sempervirens) implanted in a built-in planter behind benches creates a neat and clean green background. Evergreens supply the benefits of providing yearlong construction in built-in planters — saving time on replanting yearly flowers or tender perennials — and usually not needing maintenance.
4. Quick-growing. There is nothing really like bamboo to get a fast-growing green display. If you plant pine in hardy built-in containers, you won’t need to fret about its spreading to other regions of the garden (a legitimate concern with bamboo planted in the landscape).