I planted my corn and it all came in. I made the mistake of not thinning. I now have stalks that are 4-5 feet tall but no tassels. I have read that because of the crowding, this is why I am not getting any ears. It is now August and my garden boxes are too full. I was thinking of thinning the corn because it is not producing. If I pull the corn it may damage the shallow root system. Can I cut stalks and leave the roots? Will the roots of the cut stalks still grow? Should I get rid of it all? Is it too late to produce ears?