Oooopsssssss....
the answer was right there, I went to check for buds and as soon as I touched it the little leaf came apart.. it rotted. No roots apart just one tiny roots I can't really understand if it is still alive or not. I moved and mixed pot soil and let it there in a corner, just to see.
Sorry for this useless thread! And Sue, thanks as always for coming to help me!
The others seedling from my other cross are growing, not so fast but in a month they made progress. They get 12 hours of light per day. Should I give them more? In the basement the potting soil doesn't dry easily, I have to pay attention when giving fertilizer since one is already dead.
The remaining four seeds of this cross got mold and I tossed them.
Thanks!