When does the penis stop growing for most males? Some docs say 15-17 some say until 21-22 I started puberty at like 11.5 years old what age I stop?

Age reference... After gloriously marching into adulthood- usually after 18 years, physical growth stops as genetically coded; so, a man can not expect further penile growth afterward. Then, a man has to adopt and adapt to what he got, and use it to its fullest destiny. More? See Doc for evaluation, examination, and counseling.