I bought the Harvest Moon Dark Brown Henna Hair Dye. I very carefully followed the instructions and my gray refused to be covered. I tried twice, the gray just won't go. Now it has been several months and I want to try again.
Another brand had us add coffee and vinegar. What should I do to yours so that it will cover my gray? It is time to try again but this time I'm asking what else I can add or do that will cover this gray? Thank you!