Fast growing shrubs are great for many reasons. They can provide a quick privacy screen or hedge around your backyard. They can make your landscape look more mature and full in a shorter period of time. But probably the best reason for planting fast growing shrubs is that they will give you immediate gratification. But one thing to remember is when planting fast growing shrubs, if you plan on using them as a foundation plant select the ones that at mature size will fit in the area naturally and not take over or obstruct the view of your home.