Plants are drooping and dying not sure why

Something going on with the roots.. if not getting enough water in a big enough area, the roots are your main focus without them there dead, could be a build up of nutes because of bad watering tek. Salts are sitting there like a ring of salt on the outer edge of your watering area roots can't move in get stunted plants then gets to big for small roots and this happens.... Hope this helps..

I think amendments are good in veg but transition over to flower liquid is king. Amendments wont work if they are dry though. they rely on the soils microbe life to break em down and all life requires water. So not watering right kinda messes up that breakdown process, so the amendents just sit their doging nothing and waiting.

Dry amendmants are a poor choice........much too hard to get the feeding right......plants are slow to respond and when things go wrong, it is too late. Next grow change to liquid fertilizers. Plants look well under watered and dry. As 1001 said, you seem to be watering only next to the stem, which is completely wrong..........always water the entire pot. Give you plants a good soaking and hope they perk up and then look at changinging your feeding habits. Impossible to give better advice since you do not have a diary and no one except you knows exactly what you may or may not be doing.

Nitrogen deficiency for sure, and probably issues otherwise in regard to the droop. 4-4-4 top-dress? that's not a sufficient ratio unless your soil is providing equal parts of K. Based on previous questions, you are not overwatering. More likely underwatering. You can see a tiny watering pattern around one plant in your question from last month. As long as humidity isn't sky-high or less than 40% probably not related. Without a vpd table in front of me, i'd guess you want to be 50-55% with 73F temps. Worth checking as incredibly high VPD can make a plant droopy. Not sure about incredibly low.. i never experience such a thing. Also possible: watering habits or too close to the lights if relegated to top portion, which doesn't seem to be the case. always water entire volume. minimal runoff to ensure it for soil and soilless method requires 10% or more runoff. Wait for appropriate dryback and repeat. If not followig these basic steps, you are doing it wrong and possibly why you see what you see. normal watering should never cause droop. If it does, it is caused by a poorly constituted substrate that needs more perlite or vermiculite or similar. Watering the entire volume of substrate is the correct behaviour. Otherwise, you train superficial roots and have all sorts of potential root issues. overwatering/underwatering is either because you deviate from the above or a scapegoat for other self-inflicted behaviours. It should be really hard to overwater... like not waiting for any dryback to occur and just blindly giving volumes of water when unneeded. Saturating the soil is absolutely not over-watering. it's what you should be doing each time. Dry pockets are the devil and just shooting yourself in the foot. Superficial roots suck a big fat dick too.

How heavy are the pots? Looks like overwatering. How much/often do you water? What and how much are you feeding them?