After a minor fracture, it takes about 4-6 weeks for the primary bone scab to grow, which means that the bone starts to grow, but it also depends on the displacement of the fracture or the age of the patient, as well as the nutrition of the individual. For adults with adequate nutrition and normal physical condition, it takes about 4-6 weeks, but for middle-aged or elderly people with osteoporosis, the bone growth will be relatively slow and may take about 6-8 weeks. In addition, in the case of children or infants, the bone growth ability is relatively strong, and it will take about 2-4 weeks to start growing bones.