The scent of either oil by itself has its own definate impact, but mixed together the result is more than the sum of its parts. At the balance of about 2 parts Rosemary to 1 part Lavender, a gent at the bank practically waxed verbose about the wonderful smell when I used the blend in my hair.
In fact, this is wonderful use for the oils & people have done so for centuries. Lavender alone can be used for its scent & conditioning qualities, but this can get expensive. Rosemary adds to the cleansing & antiseptic nature of the blend & to boot has the reputation of stimulating hair growth.
Apply the blend to your hair at a rate of 6 or 7 drops per application. Avoid using more as it may irritate your skin. Massage into your scalp, brush or comb through your hair, and shine on.