Karen said don't worry about it because you will get surprised sometimes. If it is something you really, really wanted then maybe you could plant a few more just in case. Otherwise just wait and see. I planted a lot of different seeds so if a few don't make it then it's ok. My biggest sprouts were the Giant Red Cactus Zinnia, really looking forward to these and I planted both packages! My bad, I should have held back on one in case the others didn't make it. I just didn't know we would have such a late winter and stuff started sprouting.
It's a learning process and thankfully seeds are cheep, you can't afford not to try, right? I think next year I will wait till first of Feb instead of Jan. this just depends on your zone, you will learn as you go along. Even if you do kill a few along the way at least you learned something. I bet you will have a good game plan for those jugs by next year!