Definitely in need of cal mag ur in flower that's a must and bloom booster is that all you have in it soil did you put 4-4-4,great white and or endoboost those are really great with soil and helps root and uptake way better have you done a water runoff check see what the PH PPM'S ARE THAT WILL GIVE YOU A GREAT BAISE START
Looks like cal-mag deficiency Epsom salt and gypsum if you have it or cal-mag solution
What soil are you using and what nutes have you been giving it?
Fox farm, half happy frog, half ocean forest
Gox farm and down to earth amendments
What kind of amendment did you use and when was the last time you amended? Also what is your PH going in?
Can you explain why you think it is cal mag issue?
Definitely in need of cal mag ur in flower that's a must and bloom booster is that all you have in it soil did you put 4-4-4,great white and or endoboost those are really great with soil and helps root and uptake way better have you done a water runoff check see what the PH PPM'S ARE THAT WILL GIVE YOU A GREAT BAISE START
Can you explain why you think it’s cal mag?
Wait do you have cococoir in ur soil