Yellowish plants.

immobile nutrients show up on the newesth growth gottagrowsometime so bang bang, your 2 cents got shot down by your favorite person. this plant is just hungry not drooping not unhappy, just hungry overall notice the lower most growth is yellowing as well, indicating n is being pulled out of them too.. not lacking a single ion it requires just a general full spectrum fertilization.

Also zinc has a hard time in uptake if you have contsnly wet soil and it looks awful dark in all your pics. Just my 2cents but I'm sure my favourite person will shoot that down if he hasn't already.

It looks similar to zinc issue. It has the very early signs of zinc. It is a very hard nutrient to dig earlier on.. But tell signs are in your lower growth. The vains look whitish and the tips go like that. Zinc is an immobile nutrient and shows like that on the tips and on lower growth you get whitish stuff on the vains as I said (chlorois) I'm nearly sure it's called, could be wrong. To me it looks like an immobile nutrient. Yes, later zinc stages is very easy to spot but how it starts is how I said I'm not sure if I can see chlorois in the vains they look whitish. So y I'm saying zinc.. I'm not sure the PH ratios depending on substrate I can't remember you can quickly look it up and if you see the sign I said. Anyways, what it looks like to me. As its appearing to around the bud sites so I'm thinking immobile nutrient as NPK is mobile and if it was one of them you'd see it in lower older growth. Good luck.

Your diary doesn't indicate what you're feeding or how much... since the problem is starting at the tips, it's most likely nute burn.... You also haven't reported what your PH is and that might have a lot to do with the problem. PH of water and nutes should be 6.0 - 6.5 which will allow the plant to absorb all the macro and micro nutrients it needs (if you don't have a PH pen - this is my mantra - invest in one! It's the single most important tool you can have for any grow!) If all is well there, since she's in flower, this might also be a magnesium deficiency which a once-a-week dose of calmag would help with... The more information you give in your diary, the better able we are to help resolve issues - or at least point you in the direction WE would take if it were OUR grow... Good luck, she looks like a gorgeous plant!

oh and to put your mind at ease the other problems you listed cause very unhappy droopy plants generally yours look fine and firm and healthy down the roots and hungry up top