Herbs H

Black Henna
People have used indigo alone or in combination with henna to dye their hair black for at least 4000 years. During the 19th and 20th century indigo was such a common hair dye in Europe, that it was marketed as "black henna". Its not a true Henna, but powdered indigo resembles powdered henna and it DOES dye hair black. So, when indigo is used a as hair dye, it is often called "black henna".
From Iran.
Works best for hair that has 3% gray hair.