so the main ones i go to are almond, coconut, argon, macadamia and olive. i treat my hair with these oils in addition to doing hairstyles like plaits and buns [mainly at home of course lol] and it really helps. i've been doing this for almost 2 years now and my hair has grown significantly =]
I don't know where I saw this, but studies showed that if you don't wash your hair everyday, it'd grow even faster compared to if you wash it everyday. As much as I want it to grow quicker, I couldn't stand not washing my hair lol unless I'm sick. But my friends tried and said it worked. Not completely sure tho.