10-15 yrs: Puberty happens at a wide range of ages and there are several stages. Most boys notice testicles getting bigger around 12-13 yrs (some sooner, some later). Pubic hair and penile growth occur between 11 -16, but usually 13-14yrs. Boys complete puberty around 16-18 yrs, some as young as 14 yrs. If you notice problems with puberty, talk with your pediatrician.
Answered 8/6/2013
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See below.: The start of puberty in boys can range from 10 1/2 to 15 years old (average is about 13 years) and pubertal development may not be complete until the late teens.
Answered 1/9/2018
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