Emerald cedars, which are also called Smaragd cedars, are very fast growing and make a great hedge. Their fast growing habit is one of the reasons they are commonly used for hedging on the Lower Mainland.
Boxwood shrubs are shrubs within the genus, Buxus. This genus is within the family, Buxaceae. There are roughly 70 species within Buxus, and they are all shrubs or small trees. In addition, there are hundreds of cultivars to choose from. Everything within this genus is called a Boxwood.