How To Grow 5inches Of Hair Fast?

Use shampoo once a week or in fifteen days. Don't overuse the shampoo. Chemical Conditioners will damage your hair. Try to use natural shampoos, i know they are expensive, but when you use it once in 15 days, it will not effect your budget. Secondly, Take vitamin E supplements. Vitamin E is the food of the hair.
Apply raw egg and henna on your hair (at least once a week). Don't waste your time and money on hair energizers , they all contain above mentioned ingredients. Regularly apply hair oil (I would recommend jojoba hair oil).

If this doesn't work, then nothing will work.

2 months is not enough! It needs at least 4 or 5 months. There is no shortcut in life.

Try garnier fructis long and strong i'm not so sure if it will grow exactly 5 inches in 2 months but you will notice a significant growth of length

Cut frush onions and apply the onion juice to your hair [on the scalp]. It will promote hair growth and it'll be noticeable. Within one month you should notice some results. And by month two... It's possible that it could be 5 inches!