Dilute rosemary essential oil with a carrier oil such as coconut, jojoba, or olive oil
Apply the diluted oil to your scalp and massage gently
Leave it on for 15 to 30 minutes before washing it out
Use it 2 to 3 times per week
Add a few drops to your shampoo or conditioner
Mix it into a scalp serum or hair oil blend
Do a patch test before first use
Avoid applying undiluted rosemary oil directly to the scalp
Stop use if irritation, redness, or itching occurs
Keep it away from eyes and broken skin