It must be nice to be digging in the soil in the middle of February! We still have about 2 feet of snow on the ground, and the dirt won't be workable until some time in April around here.
I've grown Painted Mountain corn for the past 2 years and had good luck with it. It's pretty durable corn. It was developed in Montana for adverse conditions. I believe that you can eat it like sweet corn if you catch it in the milk stage, but it won't be as sweet as sweet corn.
If the seeds don't sprout in the ground because the ground isn't warm enough yet, you can start the plants indoors and then plant them after they're up to about 4-6 inches.
My Painted Mountain stalks got about 5-7 feet high, there was a range of heights. You'll get different colored stalks with the corn, mostly green or red stalks. It's really interesting stuff. It's an early maturing corn, so that might help with 2 crops where you live.