Discoloration top leaves

Keep it simple my friend up your nitrogen slightly and up the calmag slightly judging by what I can see I’m gonna go with calmag, calmag is also beneficial for up taking other nutrients so I’m gonna say final answer: calmag

Hi bud. From my experience, the pistols are still a healthy cream color. They are standing, not in any way shriveled or worse yet singed/burned. Your leaves are not taco folding. on the contrary, there are plenty still praying. A light-stressed plant does not pray at the bud sites it is so called stressed at without showing some kind of singing or burning. I can't chime in on ph or watering habits so ima stay out of that conversation 😇 Pic 1: If you look at the tips of the leaves, they are almost all pointed downwards and they are showing signs of shriveling. The leaves look to be being sucked dry by the plant again. Some showing rust colored alterations. Pic 2: the tips of the leaves here are dark and full of nitrogen. They are pointed outwards, not down, in a healthy manner. Some of the leaves (starting from the canopy going down) are beginning to fade. The manner in which the leaves faded in pic 2 would give me reason to increase her nitrogen intake from 50% to 75%. I also would have increased her CalMag intake from 50 to 75% to be on the safe side. This is of course considering all the data you provided is accurate, and ph/pests aren't an issue. Hope this helps, even a little. Hope you got enough popcorn....

i dont need any respect, we have person in need her,e all it matters. second picture is same plant before. her positioning will speak that plant is beeing rotated from time to time, so there shouldn't be any still green tops next to yellow ones. some tops have green leaves with lower yellow ones. it reminds me of a plant suffocated in root area, or in lockout. nitrogen and magnesium issues are first to my mind. its either ph, watering habbits, maybe hunger, but most probably root issue in any kind or form. i had plants brushing 300w leds, had setups with 1500 watts and still if i had any burn it was tops first, tacoing of leaves and so on. here leaves look more droopy than in any stress from heat or light intensity they would be ... i could carry many guessing, i did milions of mistakes, i am far from science , i am from experience side. would want a proper diary and then some ultraviolet or not steves aka numbers opinion too...

@AsNoriu with all due respect, no it doesn't.

i feel that some people trust chatgpt same way as certain drivers trusted navigation years ago ... either watering issue or salts or root bound, still all theories leads to pot, not light .

I double checked with ChatGPT. If this were my "home turf forum," I would be able to copy/paste the picture into my photo editor and then circle the light damage pattern that shows clearly in the first plant picture. Here's what ChatGPT had to say: My post - The pattern of yellow seems to indicate a light issue. Yellowing is at the top of the plant and in a line across several growing flower clusters. ChatGPT said: You're right! If the yellowing is concentrated at the top of the plant and follows a distinct pattern, it's more likely a light stress issue rather than a nutrient deficiency. Here’s what could be happening and how to fix it: Potential Light Issues Light Burn (Most Likely) Symptoms: Yellowing or bleaching of top leaves and buds, while lower foliage stays green. Cause: Grow lights too close or too intense, causing stress on the upper canopy. Solution: ✅ Raise the light 2-6 inches higher (LEDs: 18-24 inches from canopy). ✅ Lower light intensity if using dimmable LEDs. ✅ Ensure good air circulation to disperse heat. Hot Spots (Uneven Light Distribution) Symptoms: A line of yellowing in specific areas but not uniformly across the plant. Cause: Light being focused too strongly in one area, possibly due to reflectors or positioning. Solution: ✅ Adjust the angle or height of the light to spread intensity evenly. ✅ Rotate plants occasionally to prevent localized stress. Heat Stress Symptoms: Leaves curling upwards (“tacoing”) along with yellowing. Solution: ✅ Maintain 75-80°F (24-27°C) in the grow space. ✅ Increase air circulation and possibly lower ambient temp. Next Steps Measure light distance & intensity with a PAR meter (if available) or check with your hand—if it's too hot for your hand, it’s too hot for the plant. Adjust lighting as needed and monitor for improvement. Look for recovery signs over the next few days—if yellowing stops spreading, the issue is resolved.

Then its salt build up and lockout, something in the roots.....

Either dim your lights a tad (5%-10%) or raise them up 4"-6" (10cm -15cm). Then increase your feed strength to 75% of recommended. Why? - For the lights, it looks like a pattern of yellow goes pretty much through the center of the plant and follows the hotspots in your lights. The yellow is also at the top of your plant which again, suggests light stress. Raising your lights a tad slows down photosynthesis to allow your plants to adjust to these changes without further damage. Bumping the feed 25% is because your plants do appear to be slightly hungry. There's nothing drastic going on with your grow. You only need a bit of fine tuning to bring your girls around. By the way, don't expect to see the yellowness heal where it already is showing. It might, but it might not. Your indicator if you have the problem fixed will be in the plant's new growth.