Baby shampoo is a good mild soap to use in adding herbals. You will need to add one part shampoo to five parts herbal infusion. There are a large variety of herbs you can use but you need to study the properties of each herb in order to use them safely for your intended purpose. These are some of the herbs you can use and their properties. Cloves and Ground Walnut shells will highlight dark hair colors.
Lavender is good for oily hair.
Parsley improves the shine of your hair and helps prevent dandruff as does Rosemary. Rosemary and ground Walnut shells can also darken your hair. Lime flowers will soften and conditions your hair as does Thyme. Nasturtium helps your hair to gain healthy growth and Sage will not only color dark and gray hair as well as conditions it. After you are done pat dry and add this mixture to your hair slowly covering all of your hair strands.