I bought organic seeds to make popcorn. I soaked them and washed them once or twice per day (like when I make sprouts).
They germinated very well.
Can I grow corn from them?
Last year the seed (I bought seed package) did not germinate well in the garden (maybe too cold). This year I d like to grow starts in the greenhouse and plant them. When do I start starting the starts?
That's pretty much what I did to grow corn as one of my green manures. It wasn't super productive in terms of ears, at least the popcorn I used under the conditions in my garden, but it definitely worked. When you'll start your starts depends on your location and the length of the season -- corn is usually direct-seeded in North America. But I don't think there's any reason you couldn't start it inside, if your season is short or something.