Hair Growth Remedies

Just curious. If you are a teenager, then is there a set “time” for your voice to mature.
And is it possible to extend your range still in the higher octaves? I want to be able to sing a top top E comfortably. I have a top top C at the moment.

My hair is a little above my shoulders. i heard it takes about a year to grow 6 inches-_-
i use tips for hair growth like massaging my scalp, trimming my hair, deep condition, all that kind of stuff. i just started a few days ago tho. how much faster will my hair grow using these tips? how long will my hair grow in 3 months? thank you:)