A breakthrough in color and habit, ‘Sem’ is an improvement over other Sorbaria varieties in every way. Pinkish-red, fern-like spring foliage unfurls along deep pink stems. In full sun the foliage takes on a chartreuse tint and in autumn bronze hues appear. In July and August the neat, round shrub covers itself with creamy white blossoms. dwarf variety makes a wonderful low hedge.