Three renegade designers add a modern sensibility to the time-honored English garden style.

Preferred Plants

Tough late-bloomers—sedum, salvia and Persicaria—and striking scale changers, such as giant grasses mixed with ground-hugging Erigeron and creeping thyme.

Pictured: Grouping by plant type builds drama: Among bright green Persicaria, clusters of Mexican feather grass stand out like shocks of blond hair.