Essential oils

OK well I've been searching high and low to find some essential oils that people have been blogging about. The first one I found was a tea tree one from Fantasia one of my favorite product lines I might add, but it was super potent and broke me out. So I continued my search and found these products but now these are just greasy and the scent although somewhat strong in the bottle is not apparent in my hair at all. *sigh* what to do what to do. I don't want to keep adding drops of oil in because I don't want it to add build-up to my hair. Ohhh and I wasn't even sure if these were the ones that could be put in my hair, what do you think?
Here are a few pics of my hair I already washed my hair this week but after picking up the spray bottle full of shampoo and thinking it was my water and essential oil spritz I had to wash it again. Everyone keeps telling me my hair has grown but I don't see it. It definitely curled up and shrunk and therefore looks thicker but not longer, not to me anyway.