PeppaWutz - Desfran (Dutch Passion)

It can be caused by a couple of things . Usually by too much heat , or sometimes if you have a fan blowing directly on to the leaf they will taco. My guess is your Temps are too hot , 25c is your room temp but if you have your lights close the actual leaf temperature will be higher than that. So I would suggest decreasing temps or raising your lights up a little. 🌱

It's a mutation called "Fasciation" and it may be caused by a few genetic disorders such as polyploidy (extra sets of chromosomes) and genetic instability. It's usually not harmful and may even be beneficial depending on it's scale and growth! In your case I'd leave it on to mature and see the amazing shapes and sizes of those mutations! Hope this helps! Good luck and happy growing :)

P and K toxicity due to excess bloom nutes is likely. You're feeding at an EC of 2.0. Test the runoff of the affected plant, I bet its probably pushing towards 3.0.