Automatic RQS. many plants

Here w are entering in week 8. Babies are looking good, even though it is a bit crowded in there and it is starting to be a challange to get inside and water. Some of the ones in soil are still suffering from some sort of deficiency/overfeeding. Purple stems, brown spots and yellow leaves. I thought it might be K deficiency so i gave them a bit of PK 13/14. I read that damaged leaves do not recover, so i'm still not sure if i have done the right thing. There are some evident differences between coco and soil, but i think it is due to the fact that soil ones are a bit less stress resistant, and the heat strike the took in the beginning is still showing. For the moment they have bigger buds, but smaller stems and, as i said, have a bit of yellow leaves. They are starting to have resin on leaves. The coco ones for the moment have smaller buds (I hope it is normal, as the strain label said that normally we should be harvesting in a week but we are no where there yet). Overall at the moment happy for a first grow, there has been plenty of mistakes, but it was foreseeable. I did a light defoliation because in there it was a jungle, there were plenty of leaves that could not possibly take light and many that overshadowed buds. I have been gentle and not excessive, i think, for fear of doing bullshit. Wish you well, share your thoughts!!