At maturity, a Fuyu persimmon tree gets to be about 12 to 15 feet tall with a spread that is slightly smaller. However, at times these trees can surpass that estimated height and reach as much as 20 feet tall. It can take several years for Fuyu persimmon trees to reach their full size, as they have a moderate growth rate that can vary from 12 to 24 inches per year. Proper growth conditions will dictate how quickly your Fuyu persimmon tree develops.