Westringia is an evergreen shrub that comes to us from Australia, where it grows in exposed locations on coastal cliffs. Mature size can be variable, depending on the cultivar grown, garden location and irrigation practices. Hybrid varieties such as ‘Blue Gem and ‘Sorrento Coast’ tend to stay a bit more compact. Having said that, even the species takes well to light shearing to maintain size and shape. Sizes range from 3-6 ft tall to 5 to 10ft wide.