They both involve using Red henna as it sticks to gray hair the best.
It's an important part of covering grays, since the Indigo NEEDS henna to stick to your hair.
Method: Do one full Red Henna treatment and then follow up with a Brown or Black Henna treatment.
You can also cover grey with Morrocco Method's Light Blonde Henna.
It turns your gray hair into a lovely, sun-streaked blonde!!
Super awesome!!!! : )
See more HERE (with helpful Henna Color Chart).
For useful Henna FAQ's Click HERE.