No, I would say it wasn’t too late. They can handle that in the short term; of course, each one behaves a bit differently, but if you counteract in time, they won’t suffer any, or any major, damage from it. She still looks good.
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To me, that looks like nutrient burn. 500 PPFD wouldn’t cause something like that. The sun puts out around 2000 PPFD on a clear day, and most strains can handle that just fine. I’d stick to tab water for the next one or two waterings and see how the plant reacts.
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@Lynx_361 I unfortunately have to say that I use All-In-Mix soil but haven’t fertilized it myself yet. I’ve only watered it with 6.5 pH. Because it’s pre-fertilized soil, that might be it. Maybe a nutrient surplus???
@herr_gruen I have now raised my lamp to 45cm. My upper part now gets 430ppfd and the lower part about 375ppfd.
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PPFD is definitely fine, couldn’t see any deformed leaves. But what @Lynx_361 noticed would fit. Forgot that you use All Mix like me.
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@herr_gruen The upper left one.
But should I flush all my soil now? Because all useful nutrients would be lost from the soil. I don’t necessarily think that’s the best solution. Or is it?
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No, never mind. The tips are white and bending upwards, that’s from the light. Was that picture before you moved the lamp?
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Yes, exactly. Now it’s at a 45cm distance and has about 430ppfd at the tip and about 350-375ppfd
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Pretty much optimal. End of the 2nd week of the veg phase.
Average:
24.8° / 55% - 62% works out pretty well.
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I would raise the humidity a bit. When the leaf tips curl up like that, it’s almost always a sign that the humidity is too low..
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Personally I’d bump that humidity up a bit. I don’t run 55% until flower.
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What is the ph of what goes in?
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Hi 
I agree with both of you @BluntForceTrauma420 & @Lynx_361. Because I always struggle between 56% and 63%. I know that between 65-70% in the veg stage would actually be best. When I use my room humidifier, I reach a maximum of approx. 61% - 62%. I also hang 1-2 wet towels on a drying rack in the room. Then I manage to reach 65%.
Thx
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So here are my current data:
24.7° / 60% Distance to the lamp 42cm. Center: approx. 380ppfd & the tip: 475ppfd. Today I again moistened with (6.53PH) 300ml in approx. 100ml every 2 hours. Despite 2 LST strings Size: 27cm
On the upper left leaf. Here are current pictures.
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The plant looks good, after all!
Now just bump up the humidity a bit, hold off on adding nitrogen for now, and the plant will be happy!
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Thanks! Want to see the one from 12 PM today?
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