Do men grow until 18 years old?

Usually : Once growth plates are sealed no more growth in height.

Around 17-18: Unless the family has a tendency toward late growth, most male growth is done by 17-18. Linear growth continues until the growth centers close, (17-18 in most) some will have slower closure of the centers and continue at a slow pace to 20.An x-ray of the wrist and hand can be assessed for growth centers and determine if growh is still possible.