Hi there
my camera has broken down but I searched the forum and found pictures someone posted. I hope it works, if not, just search "seedling" in this forum.
cheers, Lin
they are the ones with three leafparts, shiny and often serrated

There is a photo here of even younger seedlings at the seed leaf stage -

If you are asking when seedlings might appear from seeds dropped from your plants this season -

They will need a warm moist period (in nature, this usually means as Fall rains begin), a cold moist period, and will begin to germinate while temperatures are still cool. In my maritime mild Z8, seedlings will begin appearing around December from self sown seeds, in your colder winter area it may be late winter to early Spring. Seeds sown very fresh or self sown may occasionally germinate without the long period of fluctuating temperatures but that doesn't happen often.

Here is a link that might be useful:

Thanks, that is exactly what I was asking about!

I did not notice any seedlings from the last year blooms this spring... I did not deadhead my Hellebores. This year, they bloomed better, so I'll look for seedlings next year...