Place corn in paper towel moisten with plain water & place in a closed container.
Put container on top of refrigerator or other device that stays warm 70-80f is ideal.
In 2-3 days sprouts are ready to plant.
By our calculations, you should look at sowing Japanese Hulless OP about 7 days after your last frost date.
Open pollinated variety, originally from japan. United States Department of Agriculture, PI 219881.
japanese hulless, white hulless
Japanese Hulless White