I think I misspoke. I was referring to the Golden Bantam which Burpee's says ripens in 80 days??. But they do say "it germinates well in cool soils"
This is the corn that's sold commercially here as Evans
City Corn after the area where the
local corn is grown. It's always the first corn available, small cobs.
Anyway Burpee's does have Northern Extra sweet 67 days but it just says "Cool-Soil Vigor. I hope you can get that in your local big box store displays, cause it's maybe too late to order for mail delivery.