Sensi Amnesia Autoflower test

I'm happy now again. It was good week because they had zero problem and they have a very strong smell now. Finally I see that what will be in the end and I'm calm because I can to smoke it soon. I can't wait. I need to give them more water but I added less K in this week because I don't want to add too much from this nutrition. All of good in this moment and I have a little job with them before I smoke them. I think three plants will be finish earlier for two week in turn they are from same pocket like the others. Two plants started to flowering more than one weeks later. It's not a problem for me, just I don't understand why.