After looking back and forth between your picture and the stickys, I think it might be a Calcium deficiency but I am just going on what I interpreted from the stickys so take my advice with a grain of salt. Good luck!
Lol yeah I posted pics to see if anyone could help me figure it out. I don't wanna treat for the wrong thing yah know? And it's too close for me to decide on my own but I guess I'll just wing it.
What kind of water are you using, and what fertilizer?
Soil or hydro?
how old are the plants?
how long have they been in their current container?
....and do you add epsom salt or cal/mag with your fertilizing schedule?