Boxwood in terracotta pots. I like how they take something formal and make it more whimsical. You could also move them around the garden. Idea: use terra cotta pots of various sizes interspersed among more formal plantings or for visual variety.
Secret Garden: The front door of this oceanfront Los Angeles house opens to a surprising open-air courtyard. Designer Chris Barrett clustered plants in antique pots on a concrete table from Inner Gardens.
Fast Company: Science, Brains, High Ceilings (LANDSCAPE DESIGN Decorating Styling)