What’s up growmies really need some help in seeing if anyone knows whats going on with my girl. Strain is Sunset Sherbert from Zen Labs in San Diego Ca. Running a Mars hydro tsw 2000 at 18 inches above top of canopy at about 75% power. Everythings been going good till right now about 4 weeks into flower. I top dressed about a week before plants went into flower with mostly P-K and a little bit of nitrogen. I thought it was light burn since where the majority of the problem is at but it’s par at 75% is around 800-900 at 18 inches. I think it might be the root soil PH but not sure. Have any questions let me know thanks y’all.
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Looks like light burn move your light up the curling up and being the damage is at the top of the plants are the tell tell signs of light burn
In the second pic, you see those leaves way down low all used up. The plants are missing something and are hungry.
You say you top dressed 5 weeks ago?
Have they ever had any calcium or magnesium?
What soil are you using? Tap water or RO?