The first step is to select three to four main colors to create continuity within the garden. Stunning contrast is made possible by using perennial blooms of opposing colors. Roses, delphiniums, and foxglove are traditional plant choices although you aren't restricted to these. Although free flowing, English gardens do need a certain amount of structure. You can create balance and harmony within the bed with the shape of the blooms, leaf size, and texture.
Borders are often three feet or more wide and very curvy.
They are more narrow at some parts and deeper in others. An English garden is all about surprise. Other structures might be a bench or other garden furniture, or a water feature, a fountain and pool perhaps. For whimsy you might include statues, such as frogs, or antique watering cans. If using potted plants, keep pots the same color.