First Grow - Windowsill RQS Autos

Haven't updated in a while and forgot quite some information. All plants are now in the flowering stage with Quick One being the furthest ahead closely followed by the Northern Light Auto. Some health problems on Quick One and Royal CBG. Both show yellow leaves in the lower parts. I suspected it to be a nitrogen deficiency and used 3ml/l of the Substral nutrients (vegetation). This call may have been correct for the Quick One, but the Royal CBG is probably overwatered or overfed as she is also showing clawing of some leaves pointing to nitrogen toxicity from what I've read. All plants (except the Royal CBG) drink more now, I have to water twice a week with about 1-2l per plant per watering. The Royal CBG drinks less and seems to be stunted a bit. Let's see if she will recover. The Purple Queen recovered quite well overall, but it is definitely the smallest plant. The Quick One had a thrips again a few weeks back and I treated it with Lambda-Cyhalothrin (Compo BI 58 N) on the foliage and half an hour later showered the whole plant with tap water. I hope that this is not a health hazard, but I suspect it's okay because Lambda-Cyhalothrin doesn't seem to be that stable after googling it and it still has multiple weeks until harvest. I can't detect milky trichomes yet on any plant.