Heat stress and Nute burn? Advice Please!

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FirstTimeGrower13

FirstTimeGrower13

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Hey I have 8-week old plants that started showing signs of what looks like a nutrient burn and heat burn? Some also seem to have calcium deficiencies. They're in soil - 5 gal fabric pots. 600W LED around 22" away. 75 degrees and 40% humidity. Last week it got up to 91 in the tent for a couple of days during the daytime because the heat was turned up in the room due to leaking roof issues. I watered them with 7 ph water and it came out around 5.8. I use the fox farms trio of nutrients, but stopped once I saw the burns. I haven't used cal mag yet in the grow but I'm getting some tomorrow. Any advice on what I should do? They just started their flowering cycle 3 days ago. Thank you!
 
Heat stress and nute burn advice please
Heat stress and nute burn advice please 2
Mr.GreenthumbOG

Mr.GreenthumbOG

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Tough to see with that lighting.
but your suspicions are probably correct.
watch the new growth for signs of recovery.
push some bloom nutes now.
Looks solid👊
Mr.G
 
FirstTimeGrower13

FirstTimeGrower13

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Tough to see with that lighting.
but your suspicions are probably correct.
watch the new growth for signs of recovery.
push some bloom nutes now.
Looks solid👊
Mr.G
Thanks! Should I stick with just ph balanced water for now until they look healthy again? or just lower the ppm?
 
Mr.GreenthumbOG

Mr.GreenthumbOG

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Keep feeding. Lower the grow dose. Push the bloom.
 
Mr.GreenthumbOG

Mr.GreenthumbOG

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Got it. And don't remove the sick leaves correct?
Yes. I would remove. 5d’s of leaf removal.
especially in tight scrog.
dead, dying, damaged, diseased, discoloured.
Not those top leaves tho. Ok for now.
 
FirstTimeGrower13

FirstTimeGrower13

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Yes. I would remove. 5d’s of leaf removal.
especially in tight scrog.
dead, dying, damaged, diseased, discoloured.
Not those top leaves tho. Ok for now.
Awesome, thank you. I was planning to defoliate but was concerned it would only make the problem worse. I'll put the scrog up tomorrow and hope for the best.
 
Mr.GreenthumbOG

Mr.GreenthumbOG

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I’m not much for defoliation a few days after flipping. But some wouldn’t hurt. GL 🙏
 
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