My seedlings had the hulls attached while my daughters did not.
We checked for differences, same dirt, same seeds, same garden, same jiffy pots, same table, same pointy end up.
Everything was the same, except.
My seeds were planted about a quarter inch deep.
Her seeds were buried a full one half inch down, occasionally five eighths inch.
It seems my worries about sinking the seeds too deep for them to ever find daylight were totally without merit.