There are two main styles of garden:
A formal garden design uses straight lines and/or geometric shapes. Common shapes used for formal gardens are squares, rectangles and circles. A formal garden will have a high degree of symmetry with a central focal point. The design very often includes areas where the left side is a mirror image of the right side. The planting is also formal with hedges being used to separate areas and plants being arranged in straight lines or geometric shapes. Clipped box or yew are commonly used to create architectural topiary
An informal garden design uses curves to create a fluid effect. The lines used are softer creating a more natural feel to the design. Planting is also natural with groups of plants being arranged in organic shapes. Symmetry is achieved through asymmetrical design rather than strict symmetry rules.