All plants that are listed here have foliage that is from the ground up and thus able to provide a dense separation or screen in your landscape.
There are different catagories of hedge plants. Some are knee-high shrublets, mainly used for edging a walk or path or as a formal separation around herb gardens. Others grow waist high and are used for barriers and low screening, under windows and as foundation plantings. At the other extreme are the shrubs that grow as tall as trees and are useful as windbreaks, noise reduction or screening out unsightly objects and objectionable views. In some cases, background plants can double as screening plants as well as be a functional part of your landscape. The best screening plants are the ones that grow impenetrably dense and/or have thorns.
Hedge Plants PDF