DIY Rosemary Hair Oil - A Delightful Home Rosemary is great for hair. Rosemary had been known to invigorate the scalp, stimulate hair growth, and soothe itchy skin. This makes it a great addition to hair and scalp treatments. One easy way to utilize the benefits of rosemary is to make rosemary oil. Rosemary oil is very simple to prepare. I’ll give you two methods. Both are easy, one takes a little more patience. How to Make Rosemary Hair Oil Method One: In a clean jar add ...