Hi there,
Actually once bank told me to wait for minimum 6 months before reappling.
Banks usually have this waiting period so that they could have mpre data about the person's spending habits and whether the person is credit hungry or not.
But one more thing is there, bank says to wait for that long but probably you can retry after 3 months as well.
But again if the application is rejected. Then you have to re-qualify the waiting period.
So it's best to wait for 6 months.