Special Queen #1 Feminised RQS - First German grow 🇩🇪

I was on a trip for work for 2 days, I tried my best to take care of everything before I went. They still got damaged cuz of underwatering.. also I’m not quite sure if they are underfertalized because of all the flushing for the right ph I did. They started to develop droopy yellow leaves that are pretty soft to the touch and don’t crunch up at the tips like they first did from nutrient burn. I gave them a top dress today with a mixture of 25% worm castings and 75% all mix, hopefully this will stabilise them. I would really appreciate some help in this case, as I’m not sure if it’s caused by nutrient deficiency or nutrient burn. Also I wanted to do a big defoliation and lollipoping this week, but I feel like I first should solve the nutrient problem, so I don’t start damaging the top growth.