Generally speaking, boys stop growing taller after puberty ends, i.e. after the age of 18. Due to individual differences, some boys can continue to grow taller at the age of 20.
Puberty is an important stage of growth for boys, usually starting at age 12-13 and ending at age 17-18. During this period, there is a significant increase in height and weight compared to pre-puberty. In order to increase the effect of growing taller, you should actively engage in physical exercises such as jumping rope, running and swimming in general.
A large amount of vegetables and fruits should be consumed on a daily basis to replenish the vitamins needed by the body. Active calcium supplementation can promote bone development. Sufficient amount of dairy products should be consumed and adequate sleep should be maintained.
Due to the existence of individual differences, some boys who develop late will still have a small increase in height after the age of 18, which may last until around the age of 20.