Motherhood

When Do Boys Stop Growing?

Team Peanut4 months ago6 min read

One minute they’re babies; the next they’re heading off for college. They grow up so fast! But when do men stop growing? It all comes down to genetics, and to some degree, lifestyle.

When Do Boys Stop Growing

In this article: 📝

  • When do boys stop growing taller?
  • Can a 17 year old boy still grow?
  • Do boys grow after 18?
  • Can a man still grow after 21?
  • Discussing sensitive topics during puberty
  • Need more advice on raising your teen?

When do boys stop growing taller?

Whether we like it or not, our boys will face the inevitable at some point: puberty. This has a significant effect on male growth, as well as the development of facial hair and a lower voice.

Generally speaking, boys tend to fall into the ‘early bloomer’ or ‘late bloomer’ category. Early bloomers may start to notice changes in their bodies as early as age 10, whereas late bloomers may start at age 14. Of course, these changes could easily fall anywhere in between.

When do boys stop growing in height? – The role of genetics

Genetics have a huge role to play in when men stop growing. Studies suggest that hereditary characteristics make up for about 80% of your son’s growth patterns, while the other 20% comes down to environmental factors.

Don’t forget – genetics means Mom and Dad. You can generally try to average out your son’s full height by comparing the parents. Start by adding Mom and Dad’s heights together, then divide by two. For males, add a further 2.5 inches, and you’ll have a reasonable guess. It’s not an exact science though, and environment does play a part!

How many growth spurts do boys have?

You’ve all heard the playground talk that girls mature faster than boys – but it’s actually true! Boys generally tend to develop around two years later than girls, at which point, you might notice a growth spurt.

Ever wondered why your little man suddenly can’t fit into his pants? This is down to a ‘growth spurt’ and is governed by puberty – anywhere between the ages of 10 and 16. You should expect to see an increase in height of around three inches between these ages.

Leading up to age 10, you may even see growth spurts of around 2 inches per year.

How can I increase my height at 16?

You might find yourself crying, “when do boys stop growing?!” as you reach into your purse for yet another pair of jeans. But don’t forget – this can be a very sensitive time for young men. As testosterone starts to develop, men may feel more competitive around their male peers, while adolescence is prime for ‘teenage angst.’

If your little man is worried about his height, there are some gentle lifestyle factors you can introduce. You might have other concerns – such as when do boys’ feet stop growing – but this all runs in parallel with their height, so some lifestyle changes may help.

Broach the topic sensitively with your little guy and suggest things such as:

  • Eating a balanced diet of fresh fruit and vegetables, wholegrains, protein, and dairy
  • Getting enough sleep – between 8 and 11 hours during puberty
  • Staying active and trying stretching exercises like yoga
  • Practicing better posture – difficult in the computer age, but not impossible!

Can a 17 year old boy still grow?

While 16 is considered the average cut-off point for growth in most males, it’s not a guarantee. In particular, if your son is a late bloomer, you may notice growth of up to an inch.

Do boys grow after 18?

Never mind 17 – what about 18? If your little guy is still worried, tell him all is not lost. By this age, the majority of young men stop growing as their ‘growth plates’ will have fused by this point.

A growth plate is a layer of cartilage found on either end of the longest bones in your son’s body – so they reach a certain point and stop.

Can a man still grow after 21?

Growing after 21 is extremely rare, but again, not impossible. Don’t forget that growth isn’t always about height. Young men are still developing mentally through puberty and beyond. In fact, research suggests that the brain doesn’t develop fully until age 25.

Better still, men’s muscles don’t stop growing – if you’ve got a budding Mr. Universe on your hands, he’ll be delighted to know that peak muscle mass can develop as late as age 30!

Discussing sensitive topics during puberty

Once again, don’t forget that adolescence is a very troubling time for young men and they will be confronting many body issues. With locker room talk and romantic interests, young men may have concerns about their muscles, body hair or genitals.

When do boys’ penises stop growing?

This is hardly the type of question that a young man will ask his mom, but kudos to you if he feels comfortable enough! If you are sitting down and having that ‘birds and the bees’ talk, you can subtly assure him that this can carry on until the age of 18.

Of course, it’s probably best for him to consult with a male figure in his life, but try to encourage him not to discuss it with other young men. This could lead to bullying and make him more self-conscious.

When do boys develop chest hair?

Unlike other direct indicators of puberty, chest hair can take longer to develop – with some men not seeing any until age 20. If your son doesn’t have any chest hair, this could also come down to genetics. For example, those with naturally higher levels of testosterone have hairier chests, so if his father wasn’t hairy, he may not be either.

When do men grow beards?

Beard growth in men parallels with chest hair growth – it is generally related to testosterone, and some men may struggle to grow a beard at all. Remind your son that either way is perfectly normal, and stress the importance of a good grooming routine!

Need more advice on raising your teen?

If your little guy is going through these changes in life, it can be just as much of a struggle for you. For support, guidance, and advice from other mamas, join Peanut.

Read also:
When Do Girls Stop Growing?