Want your yard to look like you have a full time gardener working your property? Try curved edges instead of straight lines. Along the cut edge, dig DEEP. Then mound the soil up and away from the edge. If your soil is the same level as your lawn, it won't look as cool.
Fragrant Summersweet blooms pink and white flowers in sun or shade. See more flowering shrubs: http://www.bhg.com/gardening/trees-shrubs-vines/shrubs/best-flowering-shrubs-for-hedges/?socsrc=bhgpin040413summersweet=4