Another way of creating interesting form in your garden is to combine different shapes of plants. Think about the final form of the plant, is it pyramid-shaped, rounded, or creeping ground cover? Whether you want clear cut shapes from topiary, or want a more informal style, add something different to the mix to pack a punch.
Cupressus sempervirens (Italian cypress) is an elegant evergreen that has a narrow and columnar habit, and can tower up to 12m tall. It’ll add height and shape to the space, having a big impact. Either choose plants with a similar habit to create a collective, or opt for different shapes to emphasise the different elements.