You can add the lavender (five drops) but not the rose geranium. It does weird things to the rose.
It is important that you do not use fragrance oils, you need to only use essential oils. They are more pricey but they work. The fragrance oils are generally synthetic scents and they don't work for some reason.
Thanks, sounds like great advice. I will, God willing, give it a try. I met a nice lady at the library who smelled so wonderful and she was wearing essential oil, that she sells. Hope to get a hold of her to buy some. She caused the whole library to smell wonderful. Not only might one be less attractive to ticks, but it sounds like one might smell awfully nice too.