Washing your hair is a good thing but washing your hair does not make the hair grow any faster.
However when you do wash your hair and keep it healthy and clean and shiny then the hair can grow better.
So you should continue washing your hair every few days to 3 times per week.
For some people washing their hair once per week is usually enough unless you get your hair dirty or have dandruff.
When you have dandruff you would wash your hair everyday with regular shampoo and then wash your hair every few days with dandruff shampoo.
But for people who have no dandruff then washing your hair every few days to once per week is enough to keep your hair clean and healthy.
Washing your hair too often can dry out the hair and strip your hair of the natural oils that keep your hair healthy.