What state/province are you in -? End of June is too late for corn, almost anywhere.

Literally no corn grew? If that is right - then it could be a reall Ph problem, not just no rain.

Where I am - we had .4" or rain in May and 2-3" rain in June - and not much since - but our may-planted corn is 8 ft tall. It loves the heat - and 2"/month is enough. Lack of rain can hinder any plot - but corn usually does better than most, especially early on.

FH