Tea Tree oil is my best friend when it comes to healthy hair. It's used for dry scalps. Water, cream, and oil based to help retain moisture. The key to retaining moisture is about how you wash out conditioner..
When your shampooing you wanna make sure to use warm water to open poors to allow the shampoo to go in and clean your scalp and removes any extra oils and dirt that you don't need. Use gentle shampoo's without sulfate, stuff like that. When you condition your hair and it's ready for you to wash that out you want to make sure you use cool water.. it'll help close up your pores so that it will retain the moisture from your conditioner in your hair
That's the first step..
2nd step is to use a water-based product for moisturizing (rosemary water with glycerine)
Oil-Based Product (saflower oil... essential oils=lemon oil, peppermint oil)
Cream-Based Product (shea butter, coconut oil, and aloe vera gel)