Week 4:
N°2,3 and 4 are growing well now. The slowest start I ever experienced but all is looking well now.
As for N°1? I had to replace it, I kept the plant but it never really grew. I'm keeping it as an experiment to see if anything will grow out of it. So sprouted a new seed that is a whole week late on their sisters.
Officially N°5 is now in it's final pot.