u/Bluejay768

I have been using the two step henna/indigo for a year now. I have gray roots. My indigo washes away every time I shampoo. And the coverage of my roots literally only lasts like a week or so before I start seeing white hair again around my temples and my hairline. Roots are fully back to white in like 2-3 weeks.
I do henna for few hours, wash with water only and indigo next day and wash with water only. I use Mi Nature brand - and buy it online (Canada) .
I don’t know what else to do and don’t wanna go back to hair dye.
please help!