Henna, popularly known as mehendi is one of the most beneficial medicinal plants from india. It is a safe and natural herbal conditioner and colorant, that nourishes hair leaving them shiny, soft and silky. It heals the hair shafts and prevents breakage. Henna for hair conditioning: Mix with warm water, yoghurt, egg, or fenugreek. Apply on hair, and leave on for 60 minutes or more, depending on preferred intensity. â?¢ Rinse thoroughly, repeating as many times as needed. henna for dyeing/coloring: Soak the henna along with coffee or tea leaves overnight. add a dash of lemon juice if you wish. The next day, apply the paste on clean hair for 60 to 90 minutes, depending on the color intensity. Rinse thoroughly, repeat as needed. Henna for body art Mix the henna with warm water. ladle the paste into pre-rolled or home-made cones for easy use. Light staining is achieved within minutes of application. To accentuate colour intensity, dab regularly with a lemon water as your design dries progressively. Henna tattoos are safe and temporary, and fade over time.