well a hair spell falls under glamor and glamore spells never work because you have to know your already beautiful for it to work and if you want to change yourself with magic then you dont believe that your beautiful. there is also the fact that all spell would do is change how people see you
oh, come on guys! Spell for making your hair longer? It's easier way to make them grow really fast and you don't have to cast a spell for that.
Every night, when you're going to sleep say to yourself that "during the night my hair will grow really fast (or will be brighter, darker, start to curl or so...)" and try to visualise that it's really happening. I't works for real. I achieved 2-3 inches a month, and a bit brightened my eyes (from hazel to dark gold).
Good luck :)