Methi is great for promoting hair growth. It is a very1 common herb found in every household, and easily available. Take some methi and roast them. After that, grind them well. Take some warm water and make a paste of methi in water. The amount of paste you need will depend on the length of your hair. Apply the paste on your hair. Cover your hair and scalp completely. Let it stay for 20 minutes, and then wash off with cold water.