When does the boys growth spurt start and end?

Boys typically experience their growth spurt during puberty, which generally begins between ages 9 and 14. The most rapid growth usually occurs around ages 12 to 16, with many boys reaching their peak height velocity around age 13 or 14. Growth usually slows down and stabilizes by the late teens, around ages 16 to 18, although some may continue to grow slightly into their early 20s.