Root Coverage. Be sure to get down to the roots of your hair as you color (this is common for all hair coloring practices). Henna has a thicker consistency than chemical dyes, less runny, and may require a little more attention to ensure that it’s touching and coloring all hair on the scalp. You want it there too—henna conditions the scalp while it colors. Detoxes the follicle-root junction and nourishes the scalp…so massage it deep to the scalp—go heavy, it’s worth it all around for color richness & treatment benefits. A hair coloring brush will definitely assist with roots, but is not paramount for quality henna hair application.