Exactly. But I have to say, with wintersowing, my seeds tend to migrate to the surface anyway. After being buried in feet of snow, then snow melt, monsoon spring rain, repeated freezing and thawing, the seeds almost always seem to be visible on the soil surface by spring germination time. But they do sprout most of the time.
Trudi's reasoning for that is "for every day, there's also a night". I can't argue with that logic.
Karen