I have now taken off the screw lid now and see what happens. Is that what you meant by making the vent bigger?
Yes.. I believe they have no roots yet and possibly using up the stored energy in the stem?
Don't know whether to trim the yellow bit or just leave it.
They are exposed to shaded bright light and a heat mat at night.
Do you think they still have a survival rate at all?
Thank you for your kind reply. very much appreciated