The answer to "instant hair growth" is that there isn't any.   I am sorry to report that there is just no known magic hair bullet. If you want to go from a short chop to long flowing locks instantly you have limited options.  Your best bet for overnight long hair is to consider hair extensions, long wigs, clip-on braids, tails or other "instant hair".

Yes, there are lots of things that can maximize the potential of your hair growing cycle but it is folly to imagine that you can go to bed one night with chin length hair and the next day wake up with a new inch of growth.

There are some very rare exceptions, but hair on most people is genetically programmed to grow an average maximum of 6 inches a year.