Onions are supposed to help in hair growth. Ginger is supposed to regulate the circulation of blood from scalp to the tip of hair strands making your hair long and shiny. You can choose either as well. If your hair growth is scanty, go for Onion juice, and if, dull, split ends bother you, then go for Ginger juice. This recipe is really simple to make and you have to apply the ginger juice on the scalp, leave it on for thirty minutes and then wash off. Repeat it once a week for best results.