Many gardens, especially those accompanying newer properties, are fairly uniform in shape. Whilst a square or rectangular garden may suit a rectilinear garden design, not everyone will want that style, some preferring curves and flowing lines as opposed to straight lines and angles. Whatever your preference in terms of design style, a garden laid bare with obvious boundary lines can lack interest, and leaves the person in the garden with little incentive to explore the space in front of them.
Using planting and features to obscure boundary lines can make a garden feel softer, and disguises where the space ends. This can make the area feel bigger than it actually is, by blurring the point where the garden finishes and the wider landscape begins. This also provides the garden designer with a chance to include different shapes, even in a completely angular plot. This quick sketch was to illustrate how in a completely square garden, the existing summerhouse in the corner could be retained, but the overall design made more interesting by introducing a series of connecting circular lawns. A very slight slope has allowed a change in level to be incorporated, to add further interest to the design. By blurring the perimeter fencing, and partially obscuring the views from one area to the next, the garden becomes much more interesting, even in this very simplistic example.