Hello starts week number 4 of flowering uses a table of sensi tower in a mixture of coconut and perlite and they started to look like this recently I would

Cal/mag problemes

they clawing hints at over-feeding which could be lockout... could be pH-related.... need more info. you are in soilless, so you provide everything... knowing what you provide helps avoid future problems... higher resolution makes future problems virtually impossible... knowing ppm of each molecule provided goes a long way to diagnosing and avoiding problems. there are ppm calculators ot there... manic botanix is one web calculator. i may have a spreadhseet linked in my profile comments section, but it may only be good for dry nutes... some of the liquid nutes need to account for specific gravity... me sheet may or may not do that right, i never verified that portion cause i use dry nutes.

Yeah. Have to agree. Its really asking a bit much to help you with a fix. Yeah, you can get some what close enough guesses like you see clear K defs. And i can also c some c clawing. So you NPK ratios are way out of wach, either that or you've used all the stuff in your soil, and it was too rich to start off and now you are short. Soil won't get through through an entire grow unless you are using supersoil or some promix and even then you might need to add to it. Join the community. Good luck.

potassium def and overall hungry by the looks of it but i’m more inclined to think its overwatering and overfertilizing causing some root issues. wish you had a diary..