I am exploring the option of using henna/indigo to dye my coppery auburn hair to a deep dark brunette, and I am a little hesistant to purhcase a kit without first asking some questions.:

First, what kind of after care products would I be able to use on my hair? I tend to have a very oily scalp, but dry ends. Will I be able to use a shampoo with SLS or will I need to switch to a sulfate free formula? Same for conditioners. What products do you recommend?

Secondly, will blow drying have an adverse effect on the color/or oxidation factor? I don't blow dry every day, but I do have to at least once or twice a week, before performances. ( I belly dance. :)  ) 

Thirdly, I have read that when using the dark brunette kit or when using a henna/indigo combo formula, that the hair can take on a greenish cast for a few days before finally settling in to the true color. What exactly does that mean? Does this green cast wash out?

Lastly, how often can I henna/indigo my hair? I have read that you can do it often as one would like, and I just want to be sure.

I have virgin hair, that I have worked hard to grow long, just past my shoulder blades. It is an auburn coppery brown color naturally, but I think I want to go darker. I also do NOT wish to harm my hair in the process, however.

If anyone can help me, or show me some before and after pics of your results with Dark Brunette Hair Kit, please let me know.

Thanks so much!