As long as the epiphysis has not closed, it is possible for a boy to continue to grow taller at the age of 18.
Boys 18 years old, is puberty, is the second growth and development of the peak period, you can eat more high protein, high calcium food in the diet. You can eat a diet high in protein and calcium, and participate in sports, such as basketball and other sports, or a combination of various aspects of the opportunity to grow taller.
It is recommended that you get more sunshine in your daily life to promote the absorption of calcium, and pay attention to the warmth of the limbs. Avoid the intake of stimulating food, do not smoke and drink alcohol, and do not drink strong coffee, strong tea and carbonated beverages, so as not to affect the development of bones.
If you want to know whether you will grow taller or not, you can go to the hospital to have the joints photographed to determine whether the epiphyses are completely closed and whether the epiphyses of the tibia and femur exist.