Cornus kousa

These like to be kept moist and like all newly or recently planted trees an area free of grass and covered with mulch several feet across should be provided around it. And dogwood in particular do not like having the bottom branches stripped off, exposing the bark to hot sun. If you think it may not be doing as well as it should those could be some involved factors.

If it does well it is genetically capable of getting much bigger than it is now. How well it does and how big it gets depends on what happens to it. And it will not get big overnight either way, if it takes off later it will still probably not grow much more than one foot per year.