From Tulani Kinard's book:

Fruit Rinses
Mix one part fruit juice to three parts water. Let them sit in the hair 20 minutes and then rinse out thoroughly.
Banana rinse- Excellent emollient, highly natural lubricant and hair conditioner; beneficial to the hair and scalp because it binds with water to hold in moisture.
Coconut milk- Great conditioning proteins. Helps reduce the loss of moisture and to soften and smooth the hair.
Lemon rinse-Stimulates the scalp, dissolves sebum buildup
Apple Cider Vinegar-retards dandruff, provides sheen to hair.
Scalp Oils for Locked Hair
Rosemary oil- Stimulates growth, antiseptic, good for dandruff, good for dandruff; excellent for shine on dark-colored hair
Sage oil- Astringent, stimulates growth, kills bacteria; it is said to have the ability to darken graying hair.
Jojoba oil- Smooths and conditions curly hair, good for dry scalp
Sweet Almond oil- Contains vitamin E and F. Good for itchy scalp, mild and easily absorbed.
Avocado oil- Rich in potassium and sulfur, vitamins A, D, and E. Easily absorbed.
Evening Primrose oil- Moisturizes and conditions the hair.
Birch oil- Antidandruff, effective in treating in flamed scalps.
Calendula oil- Light and astringent. It soothes scalp and eczema problems.