To make dreads grow longer, keep the hair as healthy as possible. This involves regularly conditioning the hair to prevent splitting, as well as eating foods that are rich in vitamins A and E to encourage a normal rate of growth.
It is a common misconception that hair in dreadlocks grows faster than loose hair. Healthy hair, whether in dreads or not, grows about 1/2-inch per month.
Some dread shampoos and soaps claim to enhance growth rates, but be wary of these products and always consult consumer reviews. Many shampoos leave additives in the hair that will damage follicles and hinder growth, according to Dreadlocks.com.