When a boy 15 years old, his bones will not be completely closed. Generally speaking, the growth and development of boys' bones will last until 18-2 1 year. So your child still has certain growth and development potential.

As for why there has been little growth in the last six months, it may be caused by many factors. For example, heredity, nutrition, exercise and other aspects will affect height growth. I suggest you pay attention to your child's nutritional intake and ensure that he takes enough nutrients such as protein, vitamins and minerals. At the same time, we should also pay attention to his exercise and sleep quality.

If you are worried about your child's height growth, you can consult a professional doctor or pediatrician for evaluation and suggestions.