Suspect the discoloration on the upper leaves may have something to do with light stress. Most signs of “hunger” show up on lower leaves first. ordinary deficiencies in np and k tend to show up on the lower/shaded leaves first, because they are mobile nutrients. If leaf deficiencies are showing up on the top of the plant, I would be looking at 1) deficiencies in immobile nutrients (like ca, doesn’t look to be an issue here imo), 2) something preventing uptake (like ph or nutrient buildup from overfeeding…maybe a possibility here), 3) vpd out of whack (could be), or 4) light intensity stressing the upper leaves (looks like a real possibility). If it were my grow, I would dim the lights a touch. Make sure cod is dialed in. Get a chart from google if needed. I would also slurry my media and make sure it’s not totally loaded with nutes or the ph is way out of range. If vpd and media are good, I would focus on the lighting. If the media looks problematic (ec/ppm of media is way higher than your feed), I would flush only if necessary but then adjust your feed. I would still raise the light to reduce stress and that could be part of the issue. Once you know the root zone is dialed and she is eating well, you can increase light intensity slowly. If she reacts negatively, you know that was also part of the problem. I’m sure others have other opinions and approaches, but this would be mine. Flowers are looking nice man. Good luck getting her over the finish line.
