l am 15, 5ft 8 and started puberty between the age of 13/14 when l was 5ft 2-4. l wanna be 6ft 2-4 and l wondered if you can grow 12 inches after starting puberty.

Depends on genetics.

You will continue to grow into your 20s, so you will be fine.

Boys typically begin their growth spurt later than girls, between ages 13 and 14. But it lasts longer—until about age 20 or 21. On an average, boys grow about 31/2 inches per year during puberty.

You simply cannot decide how long you want to become. It is all in the genetics, and so decided at the moment you are conceived! However if your parents are tall, the chances that you'd be as tall or even taller is very high!

mostly all boys grow all over incl penis till 19 /21 years