What is good about preparing your own natural herbal hair shampoo and hair treatments is that you can choose your favorite ingredients. You can experiment on the ingredients as well. You can either add more or remove some of these ingredients, depending on what ingredients work for you or are compatible with your hair type. For instance, if your hair is too oily, you can choose lemon, chamomile, rosemary or any essential oils that are good for oily hair. You can pick peppermint, lemon balm, bay leaf, or any herbs that are perfect for oily hair. If after trying many different hair shampoos you notice that your dandruff keeps coming back, you can try adding apple cider vinegar into your new hair shampoo solution and see for yourself.