Hi, I base my decision on the US descriptions which seem to be much more consistant and I allow for the differences in weather eg I pick varieties that are Ok for similar growing areas from over there.
I never pick a really late one as they are iffy at best, I tend to go by days to harvest too but generally if it is a variety i am not familiar with I check it out with one of the unis that deal with plants which seems to work pretty well.It is hard to keep up though as corn comes and goes all the time
XX Jeannine
