*Essential Oils that I love using for hair include lavender, peppermint, rosemary, and tea tree. I find this blend great for hair growth or fragile growth.
Geranium is great for frizz control and could be combined with any other oils above if this is an area of struggle for your hair.
For added fragrance and scalp benefits, consider thyme, ylang-ylang, cedarwood, lemon, grapefruit, clary sage, orange, lime, and ginger added to any of the above.
Dandruff control EOs include peppermint/spearmint/wintergreen, tea tree, thyme, cypress, cedarwood, lavender, and rosemary.