Could it be that you left the ears on the stalks a little too long? I've never before heard of this problem. Usually, the problem with corn, at that latitude and in such a climate, is that if it's not adapted for that place, it will only grow very short stalks and tiny ears. But if it produces any ears, they are usually palatable.

When we lived in Mexico, we couldn't find a sweet corn for our latitude. Instead, we learned to enjoy roasting ears, of locally available corn varieties, which were not sweet.

George
Tahlequah, OK

I agree with macmex about leaving it on the stalk too long. Some varieties of corn have a very short window for harvest. Some varieties have a 2 to 3 week harvest span. On those short window varieties, monday good and by friday or saturday too late for good quality.

It seems I pick it too soon or too late !!!!How do I know when to pick them???Any simple way ??? What do I look for ??? I picked some today -- but they all seem small and white !! as soon as they turn yellow - they are tough !

I wait until the silks are just starting to turn brown and try one ear. If it's good I start picking.

When the silks start to brown, pull back a husk and prick a couple kernels with your fingernail, if milky juice shoots out it's ready...if clear, it's not... if kernels are tough or no juice it's too late.