After my disastrous attempt to grow my hair with apple cider vinegar, and the disgusting attempt with potatoes, I was really hoping that the "third times a charm" saying would apply to my final attempt to grow my hair faster. Use Onion Water for That Fab Long Hair You might not think that onions can be used for anything except cooking, but that’s definitely not the case. Boil some onions in water and use the water on your hair — no lie! It’ll make it grow super fast and it’ll give it an…