original: It grows to up to 20 m, although it is typically more stunted in its native environment.
simplifications: It grows to up to 20 m.  It is more stunted in its native environment. It grows up to 20 m, but is usually shorter in its natural environment. It grows to up to 20 m, although it is smaller in the wild. In it's native environment it doesn't grow much. But it can still grow up to 20 m. It grows to up to 20 m. However, it is typically more stunted in its native environment It grows to up to 20 m.  Usually it is shorter in its native environment. It grows to 20 m, and it is typically more stunted in its native environment. It can grow up to 20 m but it is usually smaller in its natural environment. It grows to up to 20 m. It normally shorter in its native environment. It grows up to 20m, although it is typically more stunted in its native home.