Once you dye your hair, roots will grow back in, and you’re going to have to decide what you want to do about them. Gray hair grows faster than pigmented hair. Some people’s gray hair grows so quickly that they have to touch up their roots every week; others can wait six weeks. Fortunately, with henna, covering rapidly growing roots is simple and can be done each week as they become visible. Take some frozen henna out of your designated henna paste ice cube tray, thaw it, dab it on the visible roots before bedtime, tie on a scarf, and wash out the henna paste the next morning. You will generally not need more than a few spoonsful of henna paste for touch ups.
Read more: https://www.mehandi.com/v/vspfiles/downloadables/chapt9_graying-hair-and-doing-your-roots.pdf
Links to specific topics in this chapter:
Doing Gray Roots with Ancient Sunrise® Henna
Covering Gray Roots with an Ancient Sunrise® Henna-Indigo Mix
Dye Graying Blonde Roots Warm Black
Dye graying roots black with the Ancient Sunrise® two-step process of henna and indigo
