What all should I need to add in my henna hair dye except the eggs?

I have been using the henna hair dye from last two months but I can’t see any growth in my hair and neither I can feel them moisturized. I am using two eggs and in my conditioner – is it all what I need to add? Do you think I should add something else to my henna hair dye? How can I get maximum benefit from the henna hair dye? How many times in a month you think I should use this?