Some kids are late bloomers, experiencing the growth spurt late in the teen years, and even into college. I just saw a picture of my friends son who is a rising junior in college, and it is clear hes added some inches in the past year. teens with constitutional growth delay tend to have bones that look younger than whats expected for their age. These teens will have a late growth spurt and continue growing and developing until an older age. They usually catch up with their peers by the time theyre young adults. whereas this phase of rapid growth in most girls ends by 15 years of age, it may continue until 16 or 17 years in boys. However, exceptions exist as some teens, especially boys, may continue to grow until their late teen years. During the teen years, adolescent growth and development can be both a blessing and a curse. On the one hand, teens are getting older and developing independence. On the other hand, puberty and other stages of adolescent growth can be awkward and embarrassing. Growth for pubescent boys establishes a pattern about as unpredictable as a teenagers time of awakening each morning. There are sudden bursts of growth followed by seeming inactivity, leading to frustration on the part of the boys who wonder if that first spike in growth was also the last. Curious about how long it takes him to reach that height? Find out when boys stop growing here. A teen may grow several inches in several months, followed by a time of very slow growth. Its important to remember that these changes will happen differently for each teen. Late adolescents (18-21 and beyond!) late adolescents generally have completed physical development and grown to their full adult height. They usually have more impulse control by now and may be better able to gauge risks and rewards accurately. An adolescent may grow several inches in several months followed by a period of very slow growth, then have another growth spurt. Changes with puberty (sexual maturation) may happen gradually or several signs may become visible at the. When the cause of growth failure is unknown, they advise against routine growth hormone use and recommend a more measured decision-making approach. The nuances of this issue leave much room for open questions and differences of interpretation, said study leader adda grimberg, md , a pediatric endocrinologist at childrens hospital of philadelphia (chop).