When you have all tamales ready place them, again as vertically as you can, into the prepared steamer, with the open end on top. If there is space left in the steamer, tuck in some cornhusks, so the tamales won’t dance around. Cover with more cornhusks, and steam covered with a lid anywhere from 55 minutes to an hour. You know the tamales are ready when they come easily free from the husks.