Formal garden design can suit traditional and contemporary outdoor spaces, backyards large or small, and from urban garden to country retreat.  While formal gardens comes in all shapes and sizes, there are certain key features  you should include as part of your garden ideas when planning your elegant outdoor space.  There are ways to approach the layout and design when deciding how to plan a garden of this style. Here experts offer their advice on the essentials to get you started. Formal garden design – elements to include (Image credit: Tina James ) ‘The layout of a formal garden design should be approached mindfully and take inspiration from the local…