That's a really complicated post for me Maurice, but many thanks for sharing your knowledge.
In the meanwhile here temp keeps on going lower, the first seedling is stuck with the three leaves it already had a week ago.
I planted it in a pot.
The others seeds sprouted and are still in vermiculite.
I'm still pondering on what to do, indoors or outdoors.
As I was expecting every day is cloudy so no sun light hits the pots.