Zkittlez Auto (My first grow)

I tried defoliating two days ago but just the leaves that are underneath and started to bend toward the soil, 1-2 leaves per plant not that serious defoliating because its an autoflower and I won’t stress it to much. I did another defoliating an hour ago, 1 leaf per plant again just those trap inside the bottom part. Low stress training still on going but no new tie, i’ll try to leave it like that until the end i’ll just tuck the leaves blocking the developing pistils. I noticed that out of 3 plants, 1 is taller and bushier than the rest. Looks like the other two stunned their growth or just slow in growth. Seriously I don’t have an idea same nutrient and care are given to all plants. I feed them twice a week every 3-4 days, no negative reactions or whatnot. Nutrients adjusted in this week. Same temperature and humidity level as last week, keeping an eye daily to adjust if its not in desire level.