|I have a deck about 30|
|How about plants some dwarf azaleas like ?Orchid Lights?? This compact dwarf reaches only 2-3 feet high and wide. Orchid colored blooms are 1 1/2 ? across and are sterile, so no seed pods are produced. ?Orchid Lights? blooms two weeks before other ?Lights? azaleas, in early May. Grows well in sun to part shade.
Or, ?Crimson Pygmy? barberry? (Berberis thunbergii atropupurea ?Crimson Pygmy?) Full sun to part shade Hardy in zones 4-7 is widely used in the north because of it?s compact, mounded shape and beautiful deep burgundy red foliage. It grows to only 2 feet high and 2-3 feet wide, so it works well in small spaces or tucked in around other plantings, adding a nice contrast to greenery. In shade the foliage is a lighter red to green. Small spring flowers are barely noticed, and fruit develops that remains through the winter. ?Crimson Pygmy' has small thorns.
If you don't want anything that blooms, ?Winter Gem? boxwood is a dwarf form of the common boxwood, but with a little darker mature foliage (new growth is bright) and better cold hardiness. Growth habit is dense and uniformly rounded, reaching about 3 feet. There are many varieties that a small and rounded, about 2-4?.
Hope these suggestions are helpful.