More questions about essential oils

I'm wondering if you could usediluted essential oilsas a scalp mist on the days you don't wash. Well maybe not everyday but occasionally. The oils I'm referring to are peppermint, lemongrass, lavender, tea tree, and rosemary. I'm just not sure if it would cause skin irritation or not. I would think adding 1-3 drops to an 18oz bottle of water would be pretty dilluted right?? Just looking for opinions...
updated by @sheresa: 01/13/15 08:59:14PM

and with healling properties actualy u could apply it undiluted but the teatree id go light on maybe pepermint too since it can make your eyes water and nose run (your sinsuses would drain too)

u could make it stronger then that..oil in water tho u will hafta shake wekll b4 each use

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The peppermint would be healthy for you (like SE said: drains the sinuses and such), but can irritate sensitive skin, like the scalp. A little bit wouldn't hurt, though.

I've been using a mix of rosemary and lemongrass with water daily with no problems but but some ppl are sensitive. Love the combo smell!