Do you think it is to late to plant sweet corn? If not what day variety would still work? I have a fair amount of 78 day that I was thinking about using.
You're in zone 4 or 5 at best.
i think its too late. 78 days is after germination so in reality its more like 90 days. also as daylight length decreases maturity time increases.
But then saw your in wisconson and its only 78 in the day? Can you even grow anything at that temperature?