Scent to enhance astral projection?

Here's another question in regards to astral aids: Has anyone ever experimented with scents to aid astral projection? In the past I have gone to bed to the smell of roses or had a vivid dream and woke up to the smell of roses or flowers and the sound of music that I couldn't locate. I am wondering if anyone has ever used scent as a means to help them relax or the same scent to trigger relaxations. Aslo, has anyone experience phantom flower smells? When this happened to me it was the middle of winter and I didn't have any flowers or fragrances in the house as artificial fragrances give me headaches. I was thinking that maybe I could start using some essential oils like rose, or juniper or rosemary, etc. during relaxation and meditation exercises and then using those scents to speed up or enhance pre-projection relaxation in the future.