Which tree grow fast?

[instanthedge]

You can go for thuja x green giant which not only grows fast but also provides instant privacy.

[garby8265]

I agree Thuja "Green Giant" get huge and are very fast growing. We used them as privacy screen with the neighbors on one side of the house, and definetly regret using the standard arborvitae on the other. Should have gone Thuja all around instead of waiting years for the arborvitae to grow.